Haydn: Part 1 (#2007)

* Haydn: Part 1

Based on my reverse of audio 11.0.0.

As always, core implementation under LGPLv3 for the same reasons as for Amadeus.

This place the bases of a more flexible audio system while making audout & audin accurate.

This have the following improvements:
- Complete reimplementation of audout and audin.
- Audin currently only have a dummy backend.
- Dramatically reduce CPU usage by up to 50% in common cases (SoundIO and OpenAL).
- Audio Renderer now can output to 5.1 devices when supported.
- Audio Renderer init its backend on demand instead of keeping two up all the time.
- All backends implementation are now in their own project.
- Ryujinx.Audio.Renderer was renamed Ryujinx.Audio and was refactored because of this.

As a note, games having issues with OpenAL haven't improved and will not
because of OpenAL design (stopping when buffers finish playing causing
possible audio "pops" when buffers are very small).

* Update for latest hexkyz's edits on Switchbrew

* audren: Rollback channel configuration changes

* Address gdkchan's comments

* Fix typo in OpenAL backend driver

* Address last comments

* Fix a nit

* Address gdkchan's comments

Ryujinx.Audio/Renderer/Dsp/AdpcmHelper.cs

@@ -0,0 +1,219 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Dsp.State;
+using System;
+using System.Diagnostics;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp
+{
+    public static class AdpcmHelper
+    {
+        private const int FixedPointPrecision = 11;
+        private const int SamplesPerFrame = 14;
+        private const int NibblesPerFrame = SamplesPerFrame + 2;
+        private const int BytesPerFrame = 8;
+        private const int BitsPerFrame = BytesPerFrame * 8;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static uint GetAdpcmDataSize(int sampleCount)
+        {
+            Debug.Assert(sampleCount >= 0);
+
+            int frames = sampleCount / SamplesPerFrame;
+            int extraSize = 0;
+
+            if ((sampleCount % SamplesPerFrame) != 0)
+            {
+                extraSize = (sampleCount % SamplesPerFrame) / 2 + 1 + (sampleCount % 2);
+            }
+
+            return (uint)(BytesPerFrame * frames + extraSize);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int GetAdpcmOffsetFromSampleOffset(int sampleOffset)
+        {
+            Debug.Assert(sampleOffset >= 0);
+
+            return GetNibblesFromSampleCount(sampleOffset) / 2;
+        }
+
+        public static int NibbleToSample(int nibble)
+        {
+            int frames = nibble / NibblesPerFrame;
+            int extraNibbles = nibble % NibblesPerFrame;
+            int samples = SamplesPerFrame * frames;
+
+            return samples + extraNibbles - 2;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int GetNibblesFromSampleCount(int sampleCount)
+        {
+            byte headerSize = 0;
+
+            if ((sampleCount % SamplesPerFrame) != 0)
+            {
+                headerSize = 2;
+            }
+
+            return sampleCount % SamplesPerFrame + NibblesPerFrame * (sampleCount / SamplesPerFrame) + headerSize;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static short Saturate(int value)
+        {
+            if (value > short.MaxValue)
+                value = short.MaxValue;
+
+            if (value < short.MinValue)
+                value = short.MinValue;
+
+            return (short)value;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int Decode(Span<short> output, ReadOnlySpan<byte> input, int startSampleOffset, int endSampleOffset, int offset, int count, ReadOnlySpan<short> coefficients, ref AdpcmLoopContext loopContext)
+        {
+            if (input.IsEmpty || endSampleOffset < startSampleOffset)
+            {
+                return 0;
+            }
+
+            byte predScale = (byte)loopContext.PredScale;
+            byte scale = (byte)(predScale & 0xF);
+            byte coefficientIndex = (byte)((predScale >> 4) & 0xF);
+            short history0 = loopContext.History0;
+            short history1 = loopContext.History1;
+            short coefficient0 = coefficients[coefficientIndex * 2 + 0];
+            short coefficient1 = coefficients[coefficientIndex * 2 + 1];
+
+            int decodedCount = Math.Min(count, endSampleOffset - startSampleOffset - offset);
+            int nibbles = GetNibblesFromSampleCount(offset + startSampleOffset);
+            int remaining = decodedCount;
+            int outputBufferIndex = 0;
+            int inputIndex = 0;
+
+            ReadOnlySpan<byte> targetInput;
+
+            targetInput = input.Slice(nibbles / 2);
+
+            while (remaining > 0)
+            {
+                int samplesCount;
+
+                if (((uint)nibbles % NibblesPerFrame) == 0)
+                {
+                    predScale = targetInput[inputIndex++];
+
+                    scale = (byte)(predScale & 0xF);
+
+                    coefficientIndex = (byte)((predScale >> 4) & 0xF);
+
+                    coefficient0 = coefficients[coefficientIndex * 2 + 0];
+                    coefficient1 = coefficients[coefficientIndex * 2 + 1];
+
+                    nibbles += 2;
+
+                    samplesCount = Math.Min(remaining, SamplesPerFrame);
+                }
+                else
+                {
+                    samplesCount = 1;
+                }
+
+                int scaleFixedPoint = FixedPointHelper.ToFixed(1.0f, FixedPointPrecision) << scale;
+
+                if (samplesCount < SamplesPerFrame)
+                {
+                    for (int i = 0; i < samplesCount; i++)
+                    {
+                        int value = targetInput[inputIndex];
+
+                        int sample;
+
+                        if ((nibbles & 1) != 0)
+                        {
+                            sample = (value << 28) >> 28;
+
+                            inputIndex++;
+                        }
+                        else
+                        {
+                            sample = (value << 24) >> 28;
+                        }
+
+                        nibbles++;
+
+                        int prediction = coefficient0 * history0 + coefficient1 * history1;
+
+                        sample = FixedPointHelper.RoundUpAndToInt(sample * scaleFixedPoint + prediction, FixedPointPrecision);
+
+                        short saturatedSample = Saturate(sample);
+
+                        history1 = history0;
+                        history0 = saturatedSample;
+
+                        output[outputBufferIndex++] = saturatedSample;
+
+                        remaining--;
+                    }
+                }
+                else
+                {
+                    for (int i = 0; i < SamplesPerFrame / 2; i++)
+                    {
+                        int value = targetInput[inputIndex];
+
+                        int sample0;
+                        int sample1;
+
+                        sample0 = (value << 24) >> 28;
+                        sample1 = (value << 28) >> 28;
+
+                        inputIndex++;
+
+                        int prediction0 = coefficient0 * history0 + coefficient1 * history1;
+                        sample0 = FixedPointHelper.RoundUpAndToInt(sample0 * scaleFixedPoint + prediction0, FixedPointPrecision);
+                        short saturatedSample0 = Saturate(sample0);
+
+                        int prediction1 = coefficient0 * saturatedSample0 + coefficient1 * history0;
+                        sample1 = FixedPointHelper.RoundUpAndToInt(sample1 * scaleFixedPoint + prediction1, FixedPointPrecision);
+                        short saturatedSample1 = Saturate(sample1);
+
+                        history1 = saturatedSample0;
+                        history0 = saturatedSample1;
+
+                        output[outputBufferIndex++] = saturatedSample0;
+                        output[outputBufferIndex++] = saturatedSample1;
+                    }
+
+                    nibbles += SamplesPerFrame;
+                    remaining -= SamplesPerFrame;
+                }
+            }
+
+            loopContext.PredScale = predScale;
+            loopContext.History0 = history0;
+            loopContext.History1 = history1;
+
+            return decodedCount;
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/AudioProcessor.cs

@@ -0,0 +1,255 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Integration;
+using Ryujinx.Audio.Renderer.Dsp.Command;
+using Ryujinx.Audio.Renderer.Utils;
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using System;
+using System.Threading;
+
+namespace Ryujinx.Audio.Renderer.Dsp
+{
+    public class AudioProcessor : IDisposable
+    {
+        private const int MaxBufferedFrames = 5;
+        private const int TargetBufferedFrames = 3;
+
+        private enum MailboxMessage : uint
+        {
+            Start,
+            Stop,
+            RenderStart,
+            RenderEnd
+        }
+
+        private class RendererSession
+        {
+            public CommandList CommandList;
+            public int RenderingLimit;
+            public ulong AppletResourceId;
+        }
+
+        private Mailbox<MailboxMessage> _mailbox;
+        private RendererSession[] _sessionCommandList;
+        private Thread _workerThread;
+
+        public IHardwareDevice[] OutputDevices { get; private set; }
+
+        private long _lastTime;
+        private long _playbackEnds;
+        private ManualResetEvent _event;
+
+        public AudioProcessor()
+        {
+            _event = new ManualResetEvent(false);
+        }
+
+        private static uint GetHardwareChannelCount(IHardwareDeviceDriver deviceDriver)
+        {
+            // Get the real device driver (In case the compat layer is on top of it).
+            deviceDriver = deviceDriver.GetRealDeviceDriver();
+
+            if (deviceDriver.SupportsChannelCount(6))
+            {
+                return 6;
+            }
+            else
+            {
+                // NOTE: We default to stereo as this will get downmixed to mono by the compat layer if it's not compatible.
+                return 2;
+            }
+        }
+
+        public void Start(IHardwareDeviceDriver deviceDriver)
+        {
+            OutputDevices = new IHardwareDevice[Constants.AudioRendererSessionCountMax];
+
+            // TODO: Before enabling this, we need up-mixing from stereo to 5.1.
+            // uint channelCount = GetHardwareChannelCount(deviceDriver);
+            uint channelCount = 2;
+
+            for (int i = 0; i < OutputDevices.Length; i++)
+            {
+                // TODO: Don't hardcode sample rate.
+                OutputDevices[i] = new HardwareDeviceImpl(deviceDriver, channelCount, Constants.TargetSampleRate);
+            }
+
+            _mailbox = new Mailbox<MailboxMessage>();
+            _sessionCommandList = new RendererSession[Constants.AudioRendererSessionCountMax];
+            _event.Reset();
+            _lastTime = PerformanceCounter.ElapsedNanoseconds;
+
+            StartThread();
+
+            _mailbox.SendMessage(MailboxMessage.Start);
+
+            if (_mailbox.ReceiveResponse() != MailboxMessage.Start)
+            {
+                throw new InvalidOperationException("Audio Processor Start response was invalid!");
+            }
+        }
+
+        public void Stop()
+        {
+            _mailbox.SendMessage(MailboxMessage.Stop);
+
+            if (_mailbox.ReceiveResponse() != MailboxMessage.Stop)
+            {
+                throw new InvalidOperationException("Audio Processor Stop response was invalid!");
+            }
+
+            foreach (IHardwareDevice device in OutputDevices)
+            {
+                device.Dispose();
+            }
+        }
+
+        public void Send(int sessionId, CommandList commands, int renderingLimit, ulong appletResourceId)
+        {
+            _sessionCommandList[sessionId] = new RendererSession
+            {
+                CommandList = commands,
+                RenderingLimit = renderingLimit,
+                AppletResourceId = appletResourceId
+            };
+        }
+
+        public void Signal()
+        {
+            _mailbox.SendMessage(MailboxMessage.RenderStart);
+        }
+
+        public void Wait()
+        {
+            if (_mailbox.ReceiveResponse() != MailboxMessage.RenderEnd)
+            {
+                throw new InvalidOperationException("Audio Processor Wait response was invalid!");
+            }
+
+            long increment = Constants.AudioProcessorMaxUpdateTimeTarget;
+
+            long timeNow = PerformanceCounter.ElapsedNanoseconds;
+
+            if (timeNow > _playbackEnds)
+            {
+                // Playback has restarted.
+                _playbackEnds = timeNow;
+            }
+
+            _playbackEnds += increment;
+
+            // The number of frames we are behind where the timer says we should be.
+            long framesBehind = (timeNow - _lastTime) / increment;
+
+            // The number of frames yet to play on the backend.
+            long bufferedFrames = (_playbackEnds - timeNow) / increment + framesBehind;
+
+            // If we've entered a situation where a lot of buffers will be queued on the backend,
+            // Skip some audio frames so that playback can catch up.
+            if (bufferedFrames > MaxBufferedFrames)
+            {
+                // Skip a few frames so that we're not too far behind. (the target number of frames)
+                _lastTime += increment * (bufferedFrames - TargetBufferedFrames);
+            }
+
+            while (timeNow < _lastTime + increment)
+            {
+                _event.WaitOne(1);
+
+                timeNow = PerformanceCounter.ElapsedNanoseconds;
+            }
+
+            _lastTime += increment;
+        }
+
+        private void StartThread()
+        {
+            _workerThread = new Thread(Work)
+            {
+                Name = "AudioProcessor.Worker"
+            };
+
+            _workerThread.Start();
+        }
+
+        private void Work()
+        {
+            if (_mailbox.ReceiveMessage() != MailboxMessage.Start)
+            {
+                throw new InvalidOperationException("Audio Processor Start message was invalid!");
+            }
+
+            _mailbox.SendResponse(MailboxMessage.Start);
+            _mailbox.SendResponse(MailboxMessage.RenderEnd);
+
+            Logger.Info?.Print(LogClass.AudioRenderer, "Starting audio processor");
+
+            while (true)
+            {
+                MailboxMessage message = _mailbox.ReceiveMessage();
+
+                if (message == MailboxMessage.Stop)
+                {
+                    break;
+                }
+
+                if (message == MailboxMessage.RenderStart)
+                {
+                    long startTicks = PerformanceCounter.ElapsedNanoseconds;
+
+                    for (int i = 0; i < _sessionCommandList.Length; i++)
+                    {
+                        if (_sessionCommandList[i] != null)
+                        {
+                            _sessionCommandList[i].CommandList.Process(OutputDevices[i]);
+                            _sessionCommandList[i] = null;
+                        }
+                    }
+
+                    long endTicks = PerformanceCounter.ElapsedNanoseconds;
+
+                    long elapsedTime = endTicks - startTicks;
+
+                    if (Constants.AudioProcessorMaxUpdateTime < elapsedTime)
+                    {
+                        Logger.Debug?.Print(LogClass.AudioRenderer, $"DSP too slow (exceeded by {elapsedTime - Constants.AudioProcessorMaxUpdateTime}ns)");
+                    }
+
+                    _mailbox.SendResponse(MailboxMessage.RenderEnd);
+                }
+            }
+
+            Logger.Info?.Print(LogClass.AudioRenderer, "Stopping audio processor");
+            _mailbox.SendResponse(MailboxMessage.Stop);
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                _event.Dispose();
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/AdpcmDataSourceCommandVersion1.cs

@@ -0,0 +1,94 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Common;
+using Ryujinx.Audio.Renderer.Common;
+using System;
+using static Ryujinx.Audio.Renderer.Parameter.VoiceInParameter;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class AdpcmDataSourceCommandVersion1 : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.AdpcmDataSourceVersion1;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort OutputBufferIndex { get; }
+        public uint SampleRate { get; }
+
+        public float Pitch { get; }
+
+        public WaveBuffer[] WaveBuffers { get; }
+
+        public Memory<VoiceUpdateState> State { get; }
+
+        public ulong AdpcmParameter { get; }
+        public ulong AdpcmParameterSize { get; }
+
+        public DecodingBehaviour DecodingBehaviour { get; }
+
+        public AdpcmDataSourceCommandVersion1(ref Server.Voice.VoiceState serverState, Memory<VoiceUpdateState> state, ushort outputBufferIndex, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            OutputBufferIndex = outputBufferIndex;
+            SampleRate = serverState.SampleRate;
+            Pitch = serverState.Pitch;
+
+            WaveBuffers = new WaveBuffer[Constants.VoiceWaveBufferCount];
+
+            for (int i = 0; i < WaveBuffers.Length; i++)
+            {
+                ref Server.Voice.WaveBuffer voiceWaveBuffer = ref serverState.WaveBuffers[i];
+
+                WaveBuffers[i] = voiceWaveBuffer.ToCommon(1);
+            }
+
+            AdpcmParameter = serverState.DataSourceStateAddressInfo.GetReference(true);
+            AdpcmParameterSize = serverState.DataSourceStateAddressInfo.Size;
+            State = state;
+            DecodingBehaviour = serverState.DecodingBehaviour;
+        }
+
+        public void Process(CommandList context)
+        {
+            Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
+
+            DataSourceHelper.WaveBufferInformation info = new DataSourceHelper.WaveBufferInformation()
+            {
+                State = State,
+                SourceSampleRate = SampleRate,
+                SampleFormat = SampleFormat.Adpcm,
+                Pitch = Pitch,
+                DecodingBehaviour = DecodingBehaviour,
+                WaveBuffers = WaveBuffers,
+                ExtraParameter = AdpcmParameter,
+                ExtraParameterSize = AdpcmParameterSize,
+                ChannelIndex = 0,
+                ChannelCount = 1,
+            };
+
+            DataSourceHelper.ProcessWaveBuffers(context.MemoryManager, outputBuffer, info, context.SampleRate, (int)context.SampleCount);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/AuxiliaryBufferCommand.cs

@@ -0,0 +1,205 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Common;
+using Ryujinx.Memory;
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using static Ryujinx.Audio.Renderer.Dsp.State.AuxiliaryBufferHeader;
+using CpuAddress = System.UInt64;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class AuxiliaryBufferCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.AuxiliaryBuffer;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public uint InputBufferIndex { get; }
+        public uint OutputBufferIndex { get; }
+
+        public AuxiliaryBufferAddresses BufferInfo { get; }
+
+        public CpuAddress InputBuffer { get; }
+        public CpuAddress OutputBuffer { get; }
+        public uint CountMax { get; }
+        public uint UpdateCount { get; }
+        public uint WriteOffset { get; }
+
+        public bool IsEffectEnabled { get; }
+
+        public AuxiliaryBufferCommand(uint bufferOffset, byte inputBufferOffset, byte outputBufferOffset,
+                          ref AuxiliaryBufferAddresses sendBufferInfo, bool isEnabled, uint countMax,
+                          CpuAddress outputBuffer, CpuAddress inputBuffer, uint updateCount, uint writeOffset, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+            InputBufferIndex = bufferOffset + inputBufferOffset;
+            OutputBufferIndex = bufferOffset + outputBufferOffset;
+            BufferInfo = sendBufferInfo;
+            InputBuffer = inputBuffer;
+            OutputBuffer = outputBuffer;
+            CountMax = countMax;
+            UpdateCount = updateCount;
+            WriteOffset = writeOffset;
+            IsEffectEnabled = isEnabled;
+        }
+
+        private uint Read(IVirtualMemoryManager memoryManager, ulong bufferAddress, uint countMax, Span<int> outBuffer, uint count, uint readOffset, uint updateCount)
+        {
+            if (countMax == 0 || bufferAddress == 0)
+            {
+                return 0;
+            }
+
+            uint targetReadOffset = readOffset + AuxiliaryBufferInfo.GetReadOffset(memoryManager, BufferInfo.ReturnBufferInfo);
+
+            if (targetReadOffset > countMax)
+            {
+                return 0;
+            }
+
+            uint remaining = count;
+
+            uint outBufferOffset = 0;
+
+            while (remaining != 0)
+            {
+                uint countToWrite = Math.Min(countMax - targetReadOffset, remaining);
+
+                memoryManager.Read(bufferAddress + targetReadOffset * sizeof(int), MemoryMarshal.Cast<int, byte>(outBuffer.Slice((int)outBufferOffset, (int)countToWrite)));
+
+                targetReadOffset = (targetReadOffset + countToWrite) % countMax;
+                remaining -= countToWrite;
+                outBufferOffset += countToWrite;
+            }
+
+            if (updateCount != 0)
+            {
+                uint newReadOffset = (AuxiliaryBufferInfo.GetReadOffset(memoryManager, BufferInfo.ReturnBufferInfo) + updateCount) % countMax;
+
+                AuxiliaryBufferInfo.SetReadOffset(memoryManager, BufferInfo.ReturnBufferInfo, newReadOffset);
+            }
+
+            return count;
+        }
+
+        private uint Write(IVirtualMemoryManager memoryManager, ulong outBufferAddress, uint countMax, ReadOnlySpan<int> buffer, uint count, uint writeOffset, uint updateCount)
+        {
+            if (countMax == 0 || outBufferAddress == 0)
+            {
+                return 0;
+            }
+
+            uint targetWriteOffset = writeOffset + AuxiliaryBufferInfo.GetWriteOffset(memoryManager, BufferInfo.SendBufferInfo);
+
+            if (targetWriteOffset > countMax)
+            {
+                return 0;
+            }
+
+            uint remaining = count;
+
+            uint inBufferOffset = 0;
+
+            while (remaining != 0)
+            {
+                uint countToWrite = Math.Min(countMax - targetWriteOffset, remaining);
+
+                memoryManager.Write(outBufferAddress + targetWriteOffset * sizeof(int), MemoryMarshal.Cast<int, byte>(buffer.Slice((int)inBufferOffset, (int)countToWrite)));
+
+                targetWriteOffset = (targetWriteOffset + countToWrite) % countMax;
+                remaining -= countToWrite;
+                inBufferOffset += countToWrite;
+            }
+
+            if (updateCount != 0)
+            {
+                uint newWriteOffset = (AuxiliaryBufferInfo.GetWriteOffset(memoryManager, BufferInfo.SendBufferInfo) + updateCount) % countMax;
+
+                AuxiliaryBufferInfo.SetWriteOffset(memoryManager, BufferInfo.SendBufferInfo, newWriteOffset);
+            }
+
+            return count;
+        }
+
+        public void Process(CommandList context)
+        {
+            Span<float> inputBuffer = context.GetBuffer((int)InputBufferIndex);
+            Span<float> outputBuffer = context.GetBuffer((int)OutputBufferIndex);
+
+            if (IsEffectEnabled)
+            {
+                Span<int> inputBufferInt = MemoryMarshal.Cast<float, int>(inputBuffer);
+                Span<int> outputBufferInt = MemoryMarshal.Cast<float, int>(outputBuffer);
+
+                // Convert input data to the target format for user (int)
+                DataSourceHelper.ToInt(inputBufferInt, inputBuffer, outputBuffer.Length);
+
+                // Send the input to the user
+                Write(context.MemoryManager, OutputBuffer, CountMax, inputBufferInt, context.SampleCount, WriteOffset, UpdateCount);
+
+                // Convert back to float just in case it's reused
+                DataSourceHelper.ToFloat(inputBuffer, inputBufferInt, inputBuffer.Length);
+
+                // Retrieve the input from user
+                uint readResult = Read(context.MemoryManager, InputBuffer, CountMax, outputBufferInt, context.SampleCount, WriteOffset, UpdateCount);
+
+                // Convert the outputBuffer back to the target format of the renderer (float)
+                DataSourceHelper.ToFloat(outputBuffer, outputBufferInt, outputBuffer.Length);
+
+                if (readResult != context.SampleCount)
+                {
+                    outputBuffer.Slice((int)readResult, (int)context.SampleCount - (int)readResult).Fill(0);
+                }
+            }
+            else
+            {
+                ZeroFill(context.MemoryManager, BufferInfo.SendBufferInfo, Unsafe.SizeOf<AuxiliaryBufferInfo>());
+                ZeroFill(context.MemoryManager, BufferInfo.ReturnBufferInfo, Unsafe.SizeOf<AuxiliaryBufferInfo>());
+
+                if (InputBufferIndex != OutputBufferIndex)
+                {
+                    inputBuffer.CopyTo(outputBuffer);
+                }
+            }
+        }
+
+        private static void ZeroFill(IVirtualMemoryManager memoryManager, ulong address, int size)
+        {
+            ulong endAddress = address + (ulong)size;
+
+            while (address + 7UL < endAddress)
+            {
+                memoryManager.Write(address, 0UL);
+                address += 8;
+            }
+
+            while (address < endAddress)
+            {
+                memoryManager.Write(address, (byte)0);
+                address++;
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/BiquadFilterCommand.cs

@@ -0,0 +1,89 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Dsp.State;
+using Ryujinx.Audio.Renderer.Parameter;
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class BiquadFilterCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.BiquadFilter;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public BiquadFilterParameter Parameter { get; }
+        public Memory<BiquadFilterState> BiquadFilterState { get; }
+        public int InputBufferIndex { get; }
+        public int OutputBufferIndex { get; }
+        public bool NeedInitialization { get; }
+
+        public BiquadFilterCommand(int baseIndex, ref BiquadFilterParameter filter, Memory<BiquadFilterState> biquadFilterStateMemory, int inputBufferOffset, int outputBufferOffset, bool needInitialization, int nodeId)
+        {
+            Parameter = filter;
+            BiquadFilterState = biquadFilterStateMemory;
+            InputBufferIndex = baseIndex + inputBufferOffset;
+            OutputBufferIndex = baseIndex + outputBufferOffset;
+            NeedInitialization = needInitialization;
+
+            Enabled = true;
+            NodeId = nodeId;
+        }
+
+        private void ProcessBiquadFilter(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer, uint sampleCount)
+        {
+            const int fixedPointPrecisionForParameter = 14;
+
+            float a0 = FixedPointHelper.ToFloat(Parameter.Numerator[0], fixedPointPrecisionForParameter);
+            float a1 = FixedPointHelper.ToFloat(Parameter.Numerator[1], fixedPointPrecisionForParameter);
+            float a2 = FixedPointHelper.ToFloat(Parameter.Numerator[2], fixedPointPrecisionForParameter);
+
+            float b1 = FixedPointHelper.ToFloat(Parameter.Denominator[0], fixedPointPrecisionForParameter);
+            float b2 = FixedPointHelper.ToFloat(Parameter.Denominator[1], fixedPointPrecisionForParameter);
+
+            ref BiquadFilterState state = ref BiquadFilterState.Span[0];
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                float input = inputBuffer[i];
+                float output = input * a0 + state.Z1;
+
+                state.Z1 = input * a1 + output * b1 + state.Z2;
+                state.Z2 = input * a2 + output * b2;
+
+                outputBuffer[i] = output;
+            }
+        }
+
+        public void Process(CommandList context)
+        {
+            Span<float> outputBuffer = context.GetBuffer(InputBufferIndex);
+
+            if (NeedInitialization)
+            {
+                BiquadFilterState.Span[0] = new BiquadFilterState();
+            }
+
+            ProcessBiquadFilter(outputBuffer, outputBuffer, context.SampleCount);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/CircularBufferSinkCommand.cs

@@ -0,0 +1,91 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Parameter.Sink;
+using Ryujinx.Audio.Renderer.Server.MemoryPool;
+using System;
+using System.Diagnostics;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class CircularBufferSinkCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.CircularBufferSink;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort[] Input { get; }
+        public uint InputCount { get; }
+
+        public ulong CircularBuffer { get; }
+        public ulong CircularBufferSize { get; }
+        public ulong CurrentOffset { get; }
+
+        public CircularBufferSinkCommand(uint bufferOffset, ref CircularBufferParameter parameter, ref AddressInfo circularBufferAddressInfo, uint currentOffset, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            Input = new ushort[Constants.ChannelCountMax];
+            InputCount = parameter.InputCount;
+
+            for (int i = 0; i < InputCount; i++)
+            {
+                Input[i] = (ushort)(bufferOffset + parameter.Input[i]);
+            }
+
+            CircularBuffer = circularBufferAddressInfo.GetReference(true);
+            CircularBufferSize = parameter.BufferSize;
+            CurrentOffset = currentOffset;
+
+            Debug.Assert(CircularBuffer != 0);
+        }
+
+        public void Process(CommandList context)
+        {
+            const int targetChannelCount = 2;
+
+            ulong currentOffset = CurrentOffset;
+
+            if (CircularBufferSize > 0)
+            {
+                for (int i = 0; i < InputCount; i++)
+                {
+                    ReadOnlySpan<float> inputBuffer = context.GetBuffer(Input[i]);
+
+                    ulong targetOffset = CircularBuffer + currentOffset;
+
+                    for (int y = 0; y < context.SampleCount; y++)
+                    {
+                        context.MemoryManager.Write(targetOffset + (ulong)y * targetChannelCount, PcmHelper.Saturate(inputBuffer[y]));
+                    }
+
+                    currentOffset += context.SampleCount * targetChannelCount;
+
+                    if (currentOffset >= CircularBufferSize)
+                    {
+                        currentOffset = 0;
+                    }
+                }
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/ClearMixBufferCommand.cs

@@ -0,0 +1,41 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class ClearMixBufferCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.ClearMixBuffer;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ClearMixBufferCommand(int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+        }
+
+        public void Process(CommandList context)
+        {
+            context.Buffers.Span.Fill(0);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/CommandList.cs

@@ -0,0 +1,124 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Integration;
+using Ryujinx.Audio.Renderer.Server;
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using Ryujinx.Memory;
+using System;
+using System.Collections.Generic;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class CommandList
+    {
+        public ulong StartTime { get; private set; }
+        public ulong EndTime { get; private set; }
+        public uint SampleCount { get; }
+        public uint SampleRate { get; }
+
+        public Memory<float> Buffers { get; }
+        public uint BufferCount { get; }
+
+        public List<ICommand> Commands { get; }
+
+        public IVirtualMemoryManager MemoryManager { get; }
+
+        public IHardwareDevice OutputDevice { get; private set; }
+
+        public CommandList(AudioRenderSystem renderSystem) : this(renderSystem.MemoryManager,
+                                                                  renderSystem.GetMixBuffer(),
+                                                                  renderSystem.GetSampleCount(),
+                                                                  renderSystem.GetSampleRate(),
+                                                                  renderSystem.GetMixBufferCount(),
+                                                                  renderSystem.GetVoiceChannelCountMax())
+        {
+        }
+
+        public CommandList(IVirtualMemoryManager memoryManager, Memory<float> mixBuffer, uint sampleCount, uint sampleRate, uint mixBufferCount, uint voiceChannelCountMax)
+        {
+            SampleCount = sampleCount;
+            SampleRate = sampleRate;
+            BufferCount = mixBufferCount + voiceChannelCountMax;
+            Buffers = mixBuffer;
+            Commands = new List<ICommand>();
+            MemoryManager = memoryManager;
+        }
+
+        public void AddCommand(ICommand command)
+        {
+            Commands.Add(command);
+        }
+
+        public void AddCommand<T>(T command) where T : unmanaged, ICommand
+        {
+            throw new NotImplementedException();
+        }
+
+        public Memory<float> GetBufferMemory(int index)
+        {
+            return Buffers.Slice(index * (int)SampleCount, (int)SampleCount);
+        }
+
+        public Span<float> GetBuffer(int index)
+        {
+            return Buffers.Span.Slice(index * (int)SampleCount, (int)SampleCount);
+        }
+
+        public ulong GetTimeElapsedSinceDspStartedProcessing()
+        {
+            return (ulong)PerformanceCounter.ElapsedNanoseconds - StartTime;
+        }
+
+        public void Process(IHardwareDevice outputDevice)
+        {
+            OutputDevice = outputDevice;
+
+            StartTime = (ulong)PerformanceCounter.ElapsedNanoseconds;
+
+            foreach (ICommand command in Commands)
+            {
+                if (command.Enabled)
+                {
+                    bool shouldMeter = command.ShouldMeter();
+
+                    long startTime = 0;
+
+                    if (shouldMeter)
+                    {
+                        startTime = PerformanceCounter.ElapsedNanoseconds;
+                    }
+
+                    command.Process(this);
+
+                    if (shouldMeter)
+                    {
+                        ulong effectiveElapsedTime = (ulong)(PerformanceCounter.ElapsedNanoseconds - startTime);
+
+                        if (effectiveElapsedTime > command.EstimatedProcessingTime)
+                        {
+                            Logger.Warning?.Print(LogClass.AudioRenderer, $"Command {command.GetType().Name} took {effectiveElapsedTime}ns (expected {command.EstimatedProcessingTime}ns)");
+                        }
+                    }
+                }
+            }
+
+            EndTime = (ulong)PerformanceCounter.ElapsedNanoseconds;
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/CommandType.cs

@@ -0,0 +1,49 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public enum CommandType : byte
+    {
+        Invalid,
+        PcmInt16DataSourceVersion1,
+        PcmInt16DataSourceVersion2,
+        PcmFloatDataSourceVersion1,
+        PcmFloatDataSourceVersion2,
+        AdpcmDataSourceVersion1,
+        AdpcmDataSourceVersion2,
+        Volume,
+        VolumeRamp,
+        BiquadFilter,
+        Mix,
+        MixRamp,
+        MixRampGrouped,
+        DepopPrepare,
+        DepopForMixBuffers,
+        Delay,
+        Upsample,
+        DownMixSurroundToStereo,
+        AuxiliaryBuffer,
+        DeviceSink,
+        CircularBufferSink,
+        Reverb,
+        Reverb3d,
+        Performance,
+        ClearMixBuffer,
+        CopyMixBuffer
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/CopyMixBufferCommand.cs

@@ -0,0 +1,52 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class CopyMixBufferCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.CopyMixBuffer;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort InputBufferIndex { get; }
+        public ushort OutputBufferIndex { get; }
+
+        public CopyMixBufferCommand(uint inputBufferIndex, uint outputBufferIndex, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            InputBufferIndex = (ushort)inputBufferIndex;
+            OutputBufferIndex = (ushort)outputBufferIndex;
+        }
+
+        public void Process(CommandList context)
+        {
+            ReadOnlySpan<float> inputBuffer = context.GetBuffer(InputBufferIndex);
+            Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
+
+            inputBuffer.CopyTo(outputBuffer);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/DataSourceVersion2Command.cs

@@ -0,0 +1,127 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Common;
+using Ryujinx.Audio.Renderer.Common;
+using System;
+using static Ryujinx.Audio.Renderer.Parameter.VoiceInParameter;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class DataSourceVersion2Command : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType { get; }
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort OutputBufferIndex { get; }
+        public uint SampleRate { get; }
+
+        public float Pitch { get; }
+
+        public WaveBuffer[] WaveBuffers { get; }
+
+        public Memory<VoiceUpdateState> State { get; }
+
+        public ulong ExtraParameter { get; }
+        public ulong ExtraParameterSize { get; }
+
+        public uint ChannelIndex { get; }
+
+        public uint ChannelCount { get; }
+
+        public DecodingBehaviour DecodingBehaviour { get; }
+
+        public SampleFormat SampleFormat { get; }
+
+        public SampleRateConversionQuality SrcQuality { get; }
+
+        public DataSourceVersion2Command(ref Server.Voice.VoiceState serverState, Memory<VoiceUpdateState> state, ushort outputBufferIndex, ushort channelIndex, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+            ChannelIndex = channelIndex;
+            ChannelCount = serverState.ChannelsCount;
+            SampleFormat = serverState.SampleFormat;
+            SrcQuality = serverState.SrcQuality;
+            CommandType = GetCommandTypeBySampleFormat(SampleFormat);
+
+            OutputBufferIndex = (ushort)(channelIndex + outputBufferIndex);
+            SampleRate = serverState.SampleRate;
+            Pitch = serverState.Pitch;
+
+            WaveBuffers = new WaveBuffer[Constants.VoiceWaveBufferCount];
+
+            for (int i = 0; i < WaveBuffers.Length; i++)
+            {
+                ref Server.Voice.WaveBuffer voiceWaveBuffer = ref serverState.WaveBuffers[i];
+
+                WaveBuffers[i] = voiceWaveBuffer.ToCommon(2);
+            }
+
+            if (SampleFormat == SampleFormat.Adpcm)
+            {
+                ExtraParameter = serverState.DataSourceStateAddressInfo.GetReference(true);
+                ExtraParameterSize = serverState.DataSourceStateAddressInfo.Size;
+            }
+
+            State = state;
+            DecodingBehaviour = serverState.DecodingBehaviour;
+        }
+
+        private static CommandType GetCommandTypeBySampleFormat(SampleFormat sampleFormat)
+        {
+            switch (sampleFormat)
+            {
+                case SampleFormat.Adpcm:
+                    return CommandType.AdpcmDataSourceVersion2;
+                case SampleFormat.PcmInt16:
+                    return CommandType.PcmInt16DataSourceVersion2;
+                case SampleFormat.PcmFloat:
+                    return CommandType.PcmFloatDataSourceVersion2;
+                default:
+                    throw new NotImplementedException($"{sampleFormat}");
+            }
+        }
+
+        public void Process(CommandList context)
+        {
+            Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
+
+            DataSourceHelper.WaveBufferInformation info = new DataSourceHelper.WaveBufferInformation()
+            {
+                State = State,
+                SourceSampleRate = SampleRate,
+                SampleFormat = SampleFormat,
+                Pitch = Pitch,
+                DecodingBehaviour = DecodingBehaviour,
+                WaveBuffers = WaveBuffers,
+                ExtraParameter = ExtraParameter,
+                ExtraParameterSize = ExtraParameterSize,
+                ChannelIndex = (int)ChannelIndex,
+                ChannelCount = (int)ChannelCount,
+                SrcQuality = SrcQuality
+            };
+
+            DataSourceHelper.ProcessWaveBuffers(context.MemoryManager, outputBuffer, info, context.SampleRate, (int)context.SampleCount);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/DelayCommand.cs

@@ -0,0 +1,272 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Dsp.State;
+using Ryujinx.Audio.Renderer.Parameter.Effect;
+using Ryujinx.Audio.Renderer.Server.Effect;
+using System;
+using System.Diagnostics;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class DelayCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.Delay;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public DelayParameter Parameter => _parameter;
+        public Memory<DelayState> State { get; }
+        public ulong WorkBuffer { get; }
+        public ushort[] OutputBufferIndices { get; }
+        public ushort[] InputBufferIndices { get; }
+        public bool IsEffectEnabled { get; }
+
+        private DelayParameter _parameter;
+
+        private const int FixedPointPrecision = 14;
+
+        public DelayCommand(uint bufferOffset, DelayParameter parameter, Memory<DelayState> state, bool isEnabled, ulong workBuffer, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+            _parameter = parameter;
+            State = state;
+            WorkBuffer = workBuffer;
+
+            IsEffectEnabled = isEnabled;
+
+            InputBufferIndices = new ushort[Constants.VoiceChannelCountMax];
+            OutputBufferIndices = new ushort[Constants.VoiceChannelCountMax];
+
+            for (int i = 0; i < Parameter.ChannelCount; i++)
+            {
+                InputBufferIndices[i] = (ushort)(bufferOffset + Parameter.Input[i]);
+                OutputBufferIndices[i] = (ushort)(bufferOffset + Parameter.Output[i]);
+            }
+        }
+
+        private void ProcessDelayMono(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer, uint sampleCount)
+        {
+            ref DelayState state = ref State.Span[0];
+
+            float feedbackGain = FixedPointHelper.ToFloat(Parameter.FeedbackGain, FixedPointPrecision);
+            float inGain = FixedPointHelper.ToFloat(Parameter.InGain, FixedPointPrecision);
+            float dryGain = FixedPointHelper.ToFloat(Parameter.DryGain, FixedPointPrecision);
+            float outGain = FixedPointHelper.ToFloat(Parameter.OutGain, FixedPointPrecision);
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                float input = inputBuffer[i] * 64;
+                float delayLineValue = state.DelayLines[0].Read();
+
+                float lowPassResult = input * inGain + delayLineValue * feedbackGain * state.LowPassBaseGain + state.LowPassZ[0] * state.LowPassFeedbackGain;
+
+                state.LowPassZ[0] = lowPassResult;
+
+                state.DelayLines[0].Update(lowPassResult);
+
+                outputBuffer[i] = (input * dryGain + delayLineValue * outGain) / 64;
+            }
+        }
+
+        private void ProcessDelayStereo(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ref DelayState state = ref State.Span[0];
+
+            float[] channelInput = new float[Parameter.ChannelCount];
+            float[] delayLineValues = new float[Parameter.ChannelCount];
+            float[] temp = new float[Parameter.ChannelCount];
+
+            float delayFeedbackBaseGain = state.DelayFeedbackBaseGain;
+            float delayFeedbackCrossGain = state.DelayFeedbackCrossGain;
+            float inGain = FixedPointHelper.ToFloat(Parameter.InGain, FixedPointPrecision);
+            float dryGain = FixedPointHelper.ToFloat(Parameter.DryGain, FixedPointPrecision);
+            float outGain = FixedPointHelper.ToFloat(Parameter.OutGain, FixedPointPrecision);
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                for (int j = 0; j < Parameter.ChannelCount; j++)
+                {
+                    channelInput[j] = inputBuffers[j].Span[i] * 64;
+                    delayLineValues[j] = state.DelayLines[j].Read();
+                }
+
+                temp[0] = channelInput[0] * inGain + delayLineValues[1] * delayFeedbackCrossGain + delayLineValues[0] * delayFeedbackBaseGain;
+                temp[1] = channelInput[1] * inGain + delayLineValues[0] * delayFeedbackCrossGain + delayLineValues[1] * delayFeedbackBaseGain;
+
+                for (int j = 0; j < Parameter.ChannelCount; j++)
+                {
+                    float lowPassResult = state.LowPassFeedbackGain * state.LowPassZ[j] + temp[j] * state.LowPassBaseGain;
+
+                    state.LowPassZ[j] = lowPassResult;
+                    state.DelayLines[j].Update(lowPassResult);
+
+                    outputBuffers[j].Span[i] = (channelInput[j] * dryGain + delayLineValues[j] * outGain) / 64;
+                }
+            }
+        }
+
+        private void ProcessDelayQuadraphonic(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ref DelayState state = ref State.Span[0];
+
+            float[] channelInput = new float[Parameter.ChannelCount];
+            float[] delayLineValues = new float[Parameter.ChannelCount];
+            float[] temp = new float[Parameter.ChannelCount];
+
+            float delayFeedbackBaseGain = state.DelayFeedbackBaseGain;
+            float delayFeedbackCrossGain = state.DelayFeedbackCrossGain;
+            float inGain = FixedPointHelper.ToFloat(Parameter.InGain, FixedPointPrecision);
+            float dryGain = FixedPointHelper.ToFloat(Parameter.DryGain, FixedPointPrecision);
+            float outGain = FixedPointHelper.ToFloat(Parameter.OutGain, FixedPointPrecision);
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                for (int j = 0; j < Parameter.ChannelCount; j++)
+                {
+                    channelInput[j] = inputBuffers[j].Span[i] * 64;
+                    delayLineValues[j] = state.DelayLines[j].Read();
+                }
+
+                temp[0] = channelInput[0] * inGain + (delayLineValues[2] + delayLineValues[1]) * delayFeedbackCrossGain + delayLineValues[0] * delayFeedbackBaseGain;
+                temp[1] = channelInput[1] * inGain + (delayLineValues[0] + delayLineValues[3]) * delayFeedbackCrossGain + delayLineValues[1] * delayFeedbackBaseGain;
+                temp[2] = channelInput[2] * inGain + (delayLineValues[3] + delayLineValues[0]) * delayFeedbackCrossGain + delayLineValues[2] * delayFeedbackBaseGain;
+                temp[3] = channelInput[3] * inGain + (delayLineValues[1] + delayLineValues[2]) * delayFeedbackCrossGain + delayLineValues[3] * delayFeedbackBaseGain;
+
+                for (int j = 0; j < Parameter.ChannelCount; j++)
+                {
+                    float lowPassResult = state.LowPassFeedbackGain * state.LowPassZ[j] + temp[j] * state.LowPassBaseGain;
+
+                    state.LowPassZ[j] = lowPassResult;
+                    state.DelayLines[j].Update(lowPassResult);
+
+                    outputBuffers[j].Span[i] = (channelInput[j] * dryGain + delayLineValues[j] * outGain) / 64;
+                }
+            }
+        }
+
+        private void ProcessDelaySurround(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ref DelayState state = ref State.Span[0];
+
+            float[] channelInput = new float[Parameter.ChannelCount];
+            float[] delayLineValues = new float[Parameter.ChannelCount];
+            float[] temp = new float[Parameter.ChannelCount];
+
+            float delayFeedbackBaseGain = state.DelayFeedbackBaseGain;
+            float delayFeedbackCrossGain = state.DelayFeedbackCrossGain;
+            float inGain = FixedPointHelper.ToFloat(Parameter.InGain, FixedPointPrecision);
+            float dryGain = FixedPointHelper.ToFloat(Parameter.DryGain, FixedPointPrecision);
+            float outGain = FixedPointHelper.ToFloat(Parameter.OutGain, FixedPointPrecision);
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                for (int j = 0; j < Parameter.ChannelCount; j++)
+                {
+                    channelInput[j] = inputBuffers[j].Span[i] * 64;
+                    delayLineValues[j] = state.DelayLines[j].Read();
+                }
+
+                temp[0] = channelInput[0] * inGain + (delayLineValues[2] + delayLineValues[4]) * delayFeedbackCrossGain + delayLineValues[0] * delayFeedbackBaseGain;
+                temp[1] = channelInput[1] * inGain + (delayLineValues[4] + delayLineValues[3]) * delayFeedbackCrossGain + delayLineValues[1] * delayFeedbackBaseGain;
+                temp[2] = channelInput[2] * inGain + (delayLineValues[3] + delayLineValues[0]) * delayFeedbackCrossGain + delayLineValues[2] * delayFeedbackBaseGain;
+                temp[3] = channelInput[3] * inGain + (delayLineValues[1] + delayLineValues[2]) * delayFeedbackCrossGain + delayLineValues[3] * delayFeedbackBaseGain;
+                temp[4] = channelInput[4] * inGain + (delayLineValues[0] + delayLineValues[1]) * delayFeedbackCrossGain + delayLineValues[4] * delayFeedbackBaseGain;
+                temp[5] = channelInput[5] * inGain + delayLineValues[5] * delayFeedbackBaseGain;
+
+                for (int j = 0; j < Parameter.ChannelCount; j++)
+                {
+                    float lowPassResult = state.LowPassFeedbackGain * state.LowPassZ[j] + temp[j] * state.LowPassBaseGain;
+
+                    state.LowPassZ[j] = lowPassResult;
+                    state.DelayLines[j].Update(lowPassResult);
+
+                    outputBuffers[j].Span[i] = (channelInput[j] * dryGain + delayLineValues[j] * outGain) / 64;
+                }
+            }
+        }
+
+        private void ProcessDelay(CommandList context)
+        {
+            Debug.Assert(Parameter.IsChannelCountValid());
+
+            if (IsEffectEnabled && Parameter.IsChannelCountValid())
+            {
+                ReadOnlyMemory<float>[] inputBuffers = new ReadOnlyMemory<float>[Parameter.ChannelCount];
+                Memory<float>[] outputBuffers = new Memory<float>[Parameter.ChannelCount];
+
+                for (int i = 0; i < Parameter.ChannelCount; i++)
+                {
+                    inputBuffers[i] = context.GetBufferMemory(InputBufferIndices[i]);
+                    outputBuffers[i] = context.GetBufferMemory(OutputBufferIndices[i]);
+                }
+
+                switch (Parameter.ChannelCount)
+                {
+                    case 1:
+                        ProcessDelayMono(outputBuffers[0].Span, inputBuffers[0].Span, context.SampleCount);
+                        break;
+                    case 2:
+                        ProcessDelayStereo(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    case 4:
+                        ProcessDelayQuadraphonic(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    case 6:
+                        ProcessDelaySurround(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    default:
+                        throw new NotImplementedException($"{Parameter.ChannelCount}");
+                }
+            }
+            else
+            {
+                for (int i = 0; i < Parameter.ChannelCount; i++)
+                {
+                    if (InputBufferIndices[i] != OutputBufferIndices[i])
+                    {
+                        context.GetBufferMemory(InputBufferIndices[i]).CopyTo(context.GetBufferMemory(OutputBufferIndices[i]));
+                    }
+                }
+            }
+        }
+
+        public void Process(CommandList context)
+        {
+            ref DelayState state = ref State.Span[0];
+
+            if (IsEffectEnabled)
+            {
+                if (Parameter.Status == UsageState.Invalid)
+                {
+                    state = new DelayState(ref _parameter, WorkBuffer);
+                }
+                else if (Parameter.Status == UsageState.New)
+                {
+                    state.UpdateParameter(ref _parameter);
+                }
+            }
+
+            ProcessDelay(context);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/DepopForMixBuffersCommand.cs

@@ -0,0 +1,103 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class DepopForMixBuffersCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.DepopForMixBuffers;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public uint MixBufferOffset { get; }
+
+        public uint MixBufferCount { get; }
+
+        public float Decay { get; }
+
+        public Memory<float> DepopBuffer { get; }
+
+        private const int FixedPointPrecisionForDecay = 15;
+
+        public DepopForMixBuffersCommand(Memory<float> depopBuffer, uint bufferOffset, uint mixBufferCount, int nodeId, uint sampleRate)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+            MixBufferOffset = bufferOffset;
+            MixBufferCount = mixBufferCount;
+            DepopBuffer = depopBuffer;
+
+            if (sampleRate == 48000)
+            {
+                Decay = 0.962189f;
+            }
+            else // if (sampleRate == 32000)
+            {
+                Decay = 0.943695f;
+            }
+        }
+
+        private float ProcessDepopMix(Span<float> buffer, float depopValue, uint sampleCount)
+        {
+            if (depopValue <= 0)
+            {
+                for (int i = 0; i < sampleCount; i++)
+                {
+                    depopValue = FloatingPointHelper.MultiplyRoundDown(Decay, depopValue);
+
+                    buffer[i] -= depopValue;
+                }
+
+                return -depopValue;
+            }
+            else
+            {
+                for (int i = 0; i < sampleCount; i++)
+                {
+                    depopValue = FloatingPointHelper.MultiplyRoundDown(Decay, depopValue);
+
+                    buffer[i] += depopValue;
+                }
+
+                return depopValue;
+            }
+
+        }
+
+        public void Process(CommandList context)
+        {
+            uint bufferCount = Math.Min(MixBufferOffset + MixBufferCount, context.BufferCount);
+
+            for (int i = (int)MixBufferOffset; i < bufferCount; i++)
+            {
+                float depopValue = DepopBuffer.Span[i];
+                if (depopValue != 0)
+                {
+                    Span<float> buffer = context.GetBuffer(i);
+
+                    DepopBuffer.Span[i] = ProcessDepopMix(buffer, depopValue, context.SampleCount);
+                }
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/DepopPrepareCommand.cs

@@ -0,0 +1,72 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Common;
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class DepopPrepareCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.DepopPrepare;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public uint MixBufferCount { get; }
+
+        public ushort[] OutputBufferIndices { get; }
+
+        public Memory<VoiceUpdateState> State { get; }
+        public Memory<float> DepopBuffer { get; }
+
+        public DepopPrepareCommand(Memory<VoiceUpdateState> state, Memory<float> depopBuffer, uint mixBufferCount, uint bufferOffset, int nodeId, bool enabled)
+        {
+            Enabled = enabled;
+            NodeId = nodeId;
+            MixBufferCount = mixBufferCount;
+
+            OutputBufferIndices = new ushort[Constants.MixBufferCountMax];
+
+            for (int i = 0; i < Constants.MixBufferCountMax; i++)
+            {
+                OutputBufferIndices[i] = (ushort)(bufferOffset + i);
+            }
+
+            State = state;
+            DepopBuffer = depopBuffer;
+        }
+
+        public void Process(CommandList context)
+        {
+            ref VoiceUpdateState state = ref State.Span[0];
+
+            for (int i = 0; i < MixBufferCount; i++)
+            {
+                if (state.LastSamples[i] != 0)
+                {
+                    DepopBuffer.Span[OutputBufferIndices[i]] += state.LastSamples[i];
+
+                    state.LastSamples[i] = 0;
+                }
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/DeviceSinkCommand.cs

@@ -0,0 +1,108 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Integration;
+using Ryujinx.Audio.Renderer.Server.Sink;
+using System;
+using System.Runtime.CompilerServices;
+using System.Text;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class DeviceSinkCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.DeviceSink;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public string DeviceName { get; }
+
+        public int SessionId { get; }
+
+        public uint InputCount { get; }
+        public ushort[] InputBufferIndices { get; }
+
+        public Memory<float> Buffers { get; }
+
+        public DeviceSinkCommand(uint bufferOffset, DeviceSink sink, int sessionId, Memory<float> buffers, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            DeviceName = Encoding.ASCII.GetString(sink.Parameter.DeviceName).TrimEnd('\0');
+            SessionId = sessionId;
+            InputCount = sink.Parameter.InputCount;
+            InputBufferIndices = new ushort[InputCount];
+
+            for (int i = 0; i < InputCount; i++)
+            {
+                InputBufferIndices[i] = (ushort)(bufferOffset + sink.Parameter.Input[i]);
+            }
+
+            if (sink.UpsamplerState != null)
+            {
+                Buffers = sink.UpsamplerState.OutputBuffer;
+            }
+            else
+            {
+                Buffers = buffers;
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private Span<float> GetBuffer(int index, int sampleCount)
+        {
+            return Buffers.Span.Slice(index * sampleCount, sampleCount);
+        }
+
+        public void Process(CommandList context)
+        {
+            IHardwareDevice device = context.OutputDevice;
+
+            if (device.GetSampleRate() == Constants.TargetSampleRate)
+            {
+                int channelCount = (int)device.GetChannelCount();
+                uint bufferCount = Math.Min(device.GetChannelCount(), InputCount);
+
+                const int sampleCount = Constants.TargetSampleCount;
+
+                short[] outputBuffer = new short[bufferCount * sampleCount];
+
+                for (int i = 0; i < bufferCount; i++)
+                {
+                    ReadOnlySpan<float> inputBuffer = GetBuffer(InputBufferIndices[i], sampleCount);
+
+                    for (int j = 0; j < sampleCount; j++)
+                    {
+                        outputBuffer[i + j * channelCount] = PcmHelper.Saturate(inputBuffer[j]);
+                    }
+                }
+
+                device.AppendBuffer(outputBuffer, InputCount);
+            }
+            else
+            {
+                // TODO: support resampling for device only supporting something different
+                throw new NotImplementedException();
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/DownMixSurroundToStereoCommand.cs

@@ -0,0 +1,89 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class DownMixSurroundToStereoCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.DownMixSurroundToStereo;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort[] InputBufferIndices { get; }
+        public ushort[] OutputBufferIndices { get; }
+
+        public float[] Coefficients { get; }
+
+        public DownMixSurroundToStereoCommand(uint bufferOffset, Span<byte> inputBufferOffset, Span<byte> outputBufferOffset, ReadOnlySpan<float> downMixParameter, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            InputBufferIndices = new ushort[Constants.VoiceChannelCountMax];
+            OutputBufferIndices = new ushort[Constants.VoiceChannelCountMax];
+
+            for (int i = 0; i < Constants.VoiceChannelCountMax; i++)
+            {
+                InputBufferIndices[i] = (ushort)(bufferOffset + inputBufferOffset[i]);
+                OutputBufferIndices[i] = (ushort)(bufferOffset + outputBufferOffset[i]);
+            }
+
+            Coefficients = downMixParameter.ToArray();
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static float DownMixSurroundToStereo(ReadOnlySpan<float> coefficients, float back, float lfe, float center, float front)
+        {
+            return FloatingPointHelper.RoundUp(coefficients[3] * back + coefficients[2] * lfe + coefficients[1] * center + coefficients[0] * front);
+        }
+
+        public void Process(CommandList context)
+        {
+            ReadOnlySpan<float> frontLeft = context.GetBuffer(InputBufferIndices[0]);
+            ReadOnlySpan<float> frontRight = context.GetBuffer(InputBufferIndices[1]);
+            ReadOnlySpan<float> frontCenter = context.GetBuffer(InputBufferIndices[2]);
+            ReadOnlySpan<float> lowFrequency = context.GetBuffer(InputBufferIndices[3]);
+            ReadOnlySpan<float> backLeft = context.GetBuffer(InputBufferIndices[4]);
+            ReadOnlySpan<float> backRight = context.GetBuffer(InputBufferIndices[5]);
+
+            Span<float> stereoLeft = context.GetBuffer(OutputBufferIndices[0]);
+            Span<float> stereoRight = context.GetBuffer(OutputBufferIndices[1]);
+            Span<float> unused2 = context.GetBuffer(OutputBufferIndices[2]);
+            Span<float> unused3 = context.GetBuffer(OutputBufferIndices[3]);
+            Span<float> unused4 = context.GetBuffer(OutputBufferIndices[4]);
+            Span<float> unused5 = context.GetBuffer(OutputBufferIndices[5]);
+
+            for (int i = 0; i < context.SampleCount; i++)
+            {
+                stereoLeft[i] = DownMixSurroundToStereo(Coefficients, backLeft[i], lowFrequency[i], frontCenter[i], frontLeft[i]);
+                stereoRight[i] = DownMixSurroundToStereo(Coefficients, backRight[i], lowFrequency[i], frontCenter[i], frontRight[i]);
+            }
+
+            unused2.Fill(0);
+            unused3.Fill(0);
+            unused4.Fill(0);
+            unused5.Fill(0);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/ICommand.cs

@@ -0,0 +1,37 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public interface ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType { get; }
+
+        public ulong EstimatedProcessingTime { get; }
+
+        public void Process(CommandList context);
+
+        public bool ShouldMeter()
+        {
+            return false;
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/MixCommand.cs

@@ -0,0 +1,125 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Runtime.Intrinsics;
+using System.Runtime.Intrinsics.X86;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class MixCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.Mix;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort InputBufferIndex { get; }
+        public ushort OutputBufferIndex { get; }
+
+        public float Volume { get; }
+
+        public MixCommand(uint inputBufferIndex, uint outputBufferIndex, int nodeId, float volume)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            InputBufferIndex = (ushort)inputBufferIndex;
+            OutputBufferIndex = (ushort)outputBufferIndex;
+
+            Volume = volume;
+        }
+
+        private void ProcessMixAvx(Span<float> outputMix, ReadOnlySpan<float> inputMix)
+        {
+            Vector256<float> volumeVec = Vector256.Create(Volume);
+
+            ReadOnlySpan<Vector256<float>> inputVec = MemoryMarshal.Cast<float, Vector256<float>>(inputMix);
+            Span<Vector256<float>> outputVec = MemoryMarshal.Cast<float, Vector256<float>>(outputMix);
+
+            int sisdStart = inputVec.Length * 8;
+
+            for (int i = 0; i < inputVec.Length; i++)
+            {
+                outputVec[i] = Avx.Add(outputVec[i], Avx.Ceiling(Avx.Multiply(inputVec[i], volumeVec)));
+            }
+
+            for (int i = sisdStart; i < inputMix.Length; i++)
+            {
+                outputMix[i] += FloatingPointHelper.MultiplyRoundUp(inputMix[i], Volume);
+            }
+        }
+
+        private void ProcessMixSse41(Span<float> outputMix, ReadOnlySpan<float> inputMix)
+        {
+            Vector128<float> volumeVec = Vector128.Create(Volume);
+
+            ReadOnlySpan<Vector128<float>> inputVec = MemoryMarshal.Cast<float, Vector128<float>>(inputMix);
+            Span<Vector128<float>> outputVec = MemoryMarshal.Cast<float, Vector128<float>>(outputMix);
+
+            int sisdStart = inputVec.Length * 4;
+
+            for (int i = 0; i < inputVec.Length; i++)
+            {
+                outputVec[i] = Sse.Add(outputVec[i], Sse41.Ceiling(Sse.Multiply(inputVec[i], volumeVec)));
+            }
+
+            for (int i = sisdStart; i < inputMix.Length; i++)
+            {
+                outputMix[i] += FloatingPointHelper.MultiplyRoundUp(inputMix[i], Volume);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private void ProcessMixSlowPath(Span<float> outputMix, ReadOnlySpan<float> inputMix)
+        {
+            for (int i = 0; i < inputMix.Length; i++)
+            {
+                outputMix[i] += FloatingPointHelper.MultiplyRoundUp(inputMix[i], Volume);
+            }
+        }
+
+        private void ProcessMix(Span<float> outputMix, ReadOnlySpan<float> inputMix)
+        {
+            if (Avx.IsSupported)
+            {
+                ProcessMixAvx(outputMix, inputMix);
+            }
+            else if (Sse41.IsSupported)
+            {
+                ProcessMixSse41(outputMix, inputMix);
+            }
+            else
+            {
+                ProcessMixSlowPath(outputMix, inputMix);
+            }
+        }
+
+        public void Process(CommandList context)
+        {
+            ReadOnlySpan<float> inputBuffer = context.GetBuffer(InputBufferIndex);
+            Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
+
+            ProcessMix(outputBuffer, inputBuffer);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/MixRampCommand.cs

@@ -0,0 +1,83 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Common;
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class MixRampCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.MixRamp;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort InputBufferIndex { get; }
+        public ushort OutputBufferIndex { get; }
+
+        public float Volume0 { get; }
+        public float Volume1 { get; }
+
+        public Memory<VoiceUpdateState> State { get; }
+
+        public int LastSampleIndex { get; }
+
+        public MixRampCommand(float volume0, float volume1, uint inputBufferIndex, uint outputBufferIndex, int lastSampleIndex, Memory<VoiceUpdateState> state, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            InputBufferIndex = (ushort)inputBufferIndex;
+            OutputBufferIndex = (ushort)outputBufferIndex;
+
+            Volume0 = volume0;
+            Volume1 = volume1;
+
+            State = state;
+            LastSampleIndex = lastSampleIndex;
+        }
+
+        private float ProcessMixRamp(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer, int sampleCount)
+        {
+            float ramp = (Volume1 - Volume0) / sampleCount;
+            float volume = Volume0;
+            float state = 0;
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                state = FloatingPointHelper.MultiplyRoundUp(inputBuffer[i], volume);
+
+                outputBuffer[i] += state;
+                volume += ramp;
+            }
+
+            return state;
+        }
+
+        public void Process(CommandList context)
+        {
+            ReadOnlySpan<float> inputBuffer = context.GetBuffer(InputBufferIndex);
+            Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
+
+            State.Span[0].LastSamples[LastSampleIndex] = ProcessMixRamp(outputBuffer, inputBuffer, (int)context.SampleCount);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/MixRampGroupedCommand.cs

@@ -0,0 +1,106 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Common;
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class MixRampGroupedCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.MixRampGrouped;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public uint MixBufferCount { get; }
+
+        public ushort[] InputBufferIndices { get; }
+        public ushort[] OutputBufferIndices { get; }
+
+        public float[] Volume0 { get; }
+        public float[] Volume1 { get; }
+
+        public Memory<VoiceUpdateState> State { get; }
+
+        public MixRampGroupedCommand(uint mixBufferCount, uint inputBufferIndex, uint outputBufferIndex, Span<float> volume0, Span<float> volume1, Memory<VoiceUpdateState> state, int nodeId)
+        {
+            Enabled = true;
+            MixBufferCount = mixBufferCount;
+            NodeId = nodeId;
+
+            InputBufferIndices = new ushort[Constants.MixBufferCountMax];
+            OutputBufferIndices = new ushort[Constants.MixBufferCountMax];
+            Volume0 = new float[Constants.MixBufferCountMax];
+            Volume1 = new float[Constants.MixBufferCountMax];
+
+            for (int i = 0; i < mixBufferCount; i++)
+            {
+                InputBufferIndices[i] = (ushort)inputBufferIndex;
+                OutputBufferIndices[i] = (ushort)(outputBufferIndex + i);
+
+                Volume0[i] = volume0[i];
+                Volume1[i] = volume1[i];
+            }
+
+            State = state;
+        }
+
+        private float ProcessMixRampGrouped(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer, float volume0, float volume1, int sampleCount)
+        {
+            float ramp = (volume1 - volume0) / sampleCount;
+            float volume = volume0;
+            float state = 0;
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                state = FloatingPointHelper.MultiplyRoundUp(inputBuffer[i], volume);
+
+                outputBuffer[i] += state;
+                volume += ramp;
+            }
+
+            return state;
+        }
+
+        public void Process(CommandList context)
+        {
+            for (int i = 0; i < MixBufferCount; i++)
+            {
+                ReadOnlySpan<float> inputBuffer = context.GetBuffer(InputBufferIndices[i]);
+                Span<float> outputBuffer = context.GetBuffer(OutputBufferIndices[i]);
+
+                float volume0 = Volume0[i];
+                float volume1 = Volume1[i];
+
+                ref VoiceUpdateState state = ref State.Span[0];
+
+                if (volume0 != 0 || volume1 != 0)
+                {
+                    state.LastSamples[i] = ProcessMixRampGrouped(outputBuffer, inputBuffer, volume0, volume1, (int)context.SampleCount);
+                }
+                else
+                {
+                    state.LastSamples[i] = 0;
+                }
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/PcmFloatDataSourceCommandVersion1.cs

@@ -0,0 +1,93 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Common;
+using Ryujinx.Audio.Renderer.Common;
+using System;
+using static Ryujinx.Audio.Renderer.Parameter.VoiceInParameter;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class PcmFloatDataSourceCommandVersion1 : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.PcmFloatDataSourceVersion1;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort OutputBufferIndex { get; }
+        public uint SampleRate { get; }
+        public uint ChannelIndex { get; }
+
+        public uint ChannelCount { get; }
+
+        public float Pitch { get; }
+
+        public WaveBuffer[] WaveBuffers { get; }
+
+        public Memory<VoiceUpdateState> State { get; }
+        public DecodingBehaviour DecodingBehaviour { get; }
+
+        public PcmFloatDataSourceCommandVersion1(ref Server.Voice.VoiceState serverState, Memory<VoiceUpdateState> state, ushort outputBufferIndex, ushort channelIndex, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            OutputBufferIndex = (ushort)(channelIndex + outputBufferIndex);
+            SampleRate = serverState.SampleRate;
+            ChannelIndex = channelIndex;
+            ChannelCount = serverState.ChannelsCount;
+            Pitch = serverState.Pitch;
+
+            WaveBuffers = new WaveBuffer[Constants.VoiceWaveBufferCount];
+
+            for (int i = 0; i < WaveBuffers.Length; i++)
+            {
+                ref Server.Voice.WaveBuffer voiceWaveBuffer = ref serverState.WaveBuffers[i];
+
+                WaveBuffers[i] = voiceWaveBuffer.ToCommon(1);
+            }
+
+            State = state;
+            DecodingBehaviour = serverState.DecodingBehaviour;
+        }
+
+        public void Process(CommandList context)
+        {
+            Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
+
+            DataSourceHelper.WaveBufferInformation info = new DataSourceHelper.WaveBufferInformation()
+            {
+                State = State,
+                SourceSampleRate = SampleRate,
+                SampleFormat = SampleFormat.PcmInt16,
+                Pitch = Pitch,
+                DecodingBehaviour = DecodingBehaviour,
+                WaveBuffers = WaveBuffers,
+                ExtraParameter = 0,
+                ExtraParameterSize = 0,
+                ChannelIndex = (int)ChannelIndex,
+                ChannelCount = (int)ChannelCount,
+            };
+
+            DataSourceHelper.ProcessWaveBuffers(context.MemoryManager, outputBuffer, info, context.SampleRate, (int)context.SampleCount);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/PcmInt16DataSourceCommandVersion1.cs

@@ -0,0 +1,93 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Common;
+using Ryujinx.Audio.Renderer.Common;
+using System;
+using static Ryujinx.Audio.Renderer.Parameter.VoiceInParameter;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class PcmInt16DataSourceCommandVersion1 : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.PcmInt16DataSourceVersion1;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort OutputBufferIndex { get; }
+        public uint SampleRate { get; }
+        public uint ChannelIndex { get; }
+
+        public uint ChannelCount { get; }
+
+        public float Pitch { get; }
+
+        public WaveBuffer[] WaveBuffers { get; }
+
+        public Memory<VoiceUpdateState> State { get; }
+        public DecodingBehaviour DecodingBehaviour { get; }
+
+        public PcmInt16DataSourceCommandVersion1(ref Server.Voice.VoiceState serverState, Memory<VoiceUpdateState> state, ushort outputBufferIndex, ushort channelIndex, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            OutputBufferIndex = (ushort)(channelIndex + outputBufferIndex);
+            SampleRate = serverState.SampleRate;
+            ChannelIndex = channelIndex;
+            ChannelCount = serverState.ChannelsCount;
+            Pitch = serverState.Pitch;
+
+            WaveBuffers = new WaveBuffer[Constants.VoiceWaveBufferCount];
+
+            for (int i = 0; i < WaveBuffers.Length; i++)
+            {
+                ref Server.Voice.WaveBuffer voiceWaveBuffer = ref serverState.WaveBuffers[i];
+
+                WaveBuffers[i] = voiceWaveBuffer.ToCommon(1);
+            }
+
+            State = state;
+            DecodingBehaviour = serverState.DecodingBehaviour;
+        }
+
+        public void Process(CommandList context)
+        {
+            Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
+
+            DataSourceHelper.WaveBufferInformation info = new DataSourceHelper.WaveBufferInformation()
+            {
+                State = State,
+                SourceSampleRate = SampleRate,
+                SampleFormat = SampleFormat.PcmInt16,
+                Pitch = Pitch,
+                DecodingBehaviour = DecodingBehaviour,
+                WaveBuffers = WaveBuffers,
+                ExtraParameter = 0,
+                ExtraParameterSize = 0,
+                ChannelIndex = (int)ChannelIndex,
+                ChannelCount = (int)ChannelCount,
+            };
+
+            DataSourceHelper.ProcessWaveBuffers(context.MemoryManager, outputBuffer, info, context.SampleRate, (int)context.SampleCount);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/PerformanceCommand.cs

@@ -0,0 +1,64 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Server.Performance;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class PerformanceCommand : ICommand
+    {
+        public enum Type
+        {
+            Invalid,
+            Start,
+            End
+        }
+
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.Performance;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public PerformanceEntryAddresses PerformanceEntryAddresses { get; }
+
+        public Type PerformanceType { get; set; }
+
+        public PerformanceCommand(ref PerformanceEntryAddresses performanceEntryAddresses, Type performanceType, int nodeId)
+        {
+            Enabled = true;
+            PerformanceEntryAddresses = performanceEntryAddresses;
+            PerformanceType = performanceType;
+            NodeId = nodeId;
+        }
+
+        public void Process(CommandList context)
+        {
+            if (PerformanceType == Type.Start)
+            {
+                PerformanceEntryAddresses.SetStartTime(context.GetTimeElapsedSinceDspStartedProcessing());
+            }
+            else if (PerformanceType == Type.End)
+            {
+                PerformanceEntryAddresses.SetProcessingTime(context.GetTimeElapsedSinceDspStartedProcessing());
+                PerformanceEntryAddresses.IncrementEntryCount();
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/Reverb3dCommand.cs

@@ -0,0 +1,263 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Dsp.State;
+using Ryujinx.Audio.Renderer.Parameter.Effect;
+using Ryujinx.Audio.Renderer.Server.Effect;
+using System;
+using System.Diagnostics;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class Reverb3dCommand : ICommand
+    {
+        private static readonly int[] OutputEarlyIndicesTableMono = new int[20] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+        private static readonly int[] TargetEarlyDelayLineIndicesTableMono = new int[20] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 };
+        private static readonly int[] TargetOutputFeedbackIndicesTableMono = new int[1] { 0 };
+
+        private static readonly int[] OutputEarlyIndicesTableStereo = new int[20] { 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1 };
+        private static readonly int[] TargetEarlyDelayLineIndicesTableStereo = new int[20] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 };
+        private static readonly int[] TargetOutputFeedbackIndicesTableStereo = new int[2] { 0, 1 };
+
+        private static readonly int[] OutputEarlyIndicesTableQuadraphonic = new int[20] { 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 0, 0, 0, 0, 3, 3, 3 };
+        private static readonly int[] TargetEarlyDelayLineIndicesTableQuadraphonic = new int[20] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 };
+        private static readonly int[] TargetOutputFeedbackIndicesTableQuadraphonic = new int[4] { 0, 1, 2, 3 };
+
+        private static readonly int[] OutputEarlyIndicesTableSurround = new int[40] { 4, 5, 0, 5, 0, 5, 1, 5, 1, 5, 1, 5, 1, 5, 2, 5, 2, 5, 2, 5, 1, 5, 1, 5, 1, 5, 0, 5, 0, 5, 0, 5, 0, 5, 3, 5, 3, 5, 3, 5 };
+        private static readonly int[] TargetEarlyDelayLineIndicesTableSurround = new int[40] { 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19 };
+        private static readonly int[] TargetOutputFeedbackIndicesTableSurround = new int[6] { 0, 1, 2, 3, -1, 3 };
+
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.Reverb3d;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort InputBufferIndex { get; }
+        public ushort OutputBufferIndex { get; }
+
+        public Reverb3dParameter Parameter => _parameter;
+        public Memory<Reverb3dState> State { get; }
+        public ulong WorkBuffer { get; }
+        public ushort[] OutputBufferIndices { get; }
+        public ushort[] InputBufferIndices { get; }
+
+        public bool IsEffectEnabled { get; }
+
+        private Reverb3dParameter _parameter;
+
+        public Reverb3dCommand(uint bufferOffset, Reverb3dParameter parameter, Memory<Reverb3dState> state, bool isEnabled, ulong workBuffer, int nodeId)
+        {
+            Enabled = true;
+            IsEffectEnabled = isEnabled;
+            NodeId = nodeId;
+            _parameter = parameter;
+            State = state;
+            WorkBuffer = workBuffer;
+
+            InputBufferIndices = new ushort[Constants.VoiceChannelCountMax];
+            OutputBufferIndices = new ushort[Constants.VoiceChannelCountMax];
+
+            for (int i = 0; i < Parameter.ChannelCount; i++)
+            {
+                InputBufferIndices[i] = (ushort)(bufferOffset + Parameter.Input[i]);
+                OutputBufferIndices[i] = (ushort)(bufferOffset + Parameter.Output[i]);
+            }
+        }
+
+        private void ProcessReverb3dMono(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ProcessReverb3dGeneric(outputBuffers, inputBuffers, sampleCount, OutputEarlyIndicesTableMono, TargetEarlyDelayLineIndicesTableMono, TargetOutputFeedbackIndicesTableMono);
+        }
+
+        private void ProcessReverb3dStereo(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ProcessReverb3dGeneric(outputBuffers, inputBuffers, sampleCount, OutputEarlyIndicesTableStereo, TargetEarlyDelayLineIndicesTableStereo, TargetOutputFeedbackIndicesTableStereo);
+        }
+
+        private void ProcessReverb3dQuadraphonic(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ProcessReverb3dGeneric(outputBuffers, inputBuffers, sampleCount, OutputEarlyIndicesTableQuadraphonic, TargetEarlyDelayLineIndicesTableQuadraphonic, TargetOutputFeedbackIndicesTableQuadraphonic);
+        }
+
+        private void ProcessReverb3dSurround(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ProcessReverb3dGeneric(outputBuffers, inputBuffers, sampleCount, OutputEarlyIndicesTableSurround, TargetEarlyDelayLineIndicesTableSurround, TargetOutputFeedbackIndicesTableSurround);
+        }
+
+        private void ProcessReverb3dGeneric(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount, ReadOnlySpan<int> outputEarlyIndicesTable, ReadOnlySpan<int> targetEarlyDelayLineIndicesTable, ReadOnlySpan<int> targetOutputFeedbackIndicesTable)
+        {
+            const int delayLineSampleIndexOffset = 1;
+
+            ref Reverb3dState state = ref State.Span[0];
+
+            bool isMono = Parameter.ChannelCount == 1;
+            bool isSurround = Parameter.ChannelCount == 6;
+
+            float[] outputValues = new float[Constants.ChannelCountMax];
+            float[] channelInput = new float[Parameter.ChannelCount];
+            float[] feedbackValues = new float[4];
+            float[] feedbackOutputValues = new float[4];
+            float[] values = new float[4];
+
+            for (int sampleIndex = 0; sampleIndex < sampleCount; sampleIndex++)
+            {
+                outputValues.AsSpan().Fill(0);
+
+                float tapOut = state.PreDelayLine.TapUnsafe(state.ReflectionDelayTime, delayLineSampleIndexOffset);
+
+                for (int i = 0; i < targetEarlyDelayLineIndicesTable.Length; i++)
+                {
+                    int earlyDelayIndex = targetEarlyDelayLineIndicesTable[i];
+                    int outputIndex = outputEarlyIndicesTable[i];
+
+                    float tempTapOut = state.PreDelayLine.TapUnsafe(state.EarlyDelayTime[earlyDelayIndex], delayLineSampleIndexOffset);
+
+                    outputValues[outputIndex] += tempTapOut * state.EarlyGain[earlyDelayIndex];
+                }
+
+                float targetPreDelayValue = 0;
+
+                for (int channelIndex = 0; channelIndex < Parameter.ChannelCount; channelIndex++)
+                {
+                    channelInput[channelIndex] = inputBuffers[channelIndex].Span[sampleIndex];
+                    targetPreDelayValue += channelInput[channelIndex];
+                }
+
+                for (int i = 0; i < Parameter.ChannelCount; i++)
+                {
+                    outputValues[i] *= state.EarlyReflectionsGain;
+                }
+
+                state.PreviousPreDelayValue = (targetPreDelayValue * state.TargetPreDelayGain) + (state.PreviousPreDelayValue * state.PreviousPreDelayGain);
+
+                state.PreDelayLine.Update(state.PreviousPreDelayValue);
+
+                for (int i = 0; i < state.FdnDelayLines.Length; i++)
+                {
+                    float fdnValue = state.FdnDelayLines[i].Read();
+
+                    float feedbackOutputValue = fdnValue * state.DecayDirectFdnGain[i] + state.PreviousFeedbackOutputDecayed[i];
+
+                    state.PreviousFeedbackOutputDecayed[i] = (fdnValue * state.DecayCurrentFdnGain[i]) + (feedbackOutputValue * state.DecayCurrentOutputGain[i]);
+
+                    feedbackOutputValues[i] = feedbackOutputValue;
+                }
+
+                feedbackValues[0] = feedbackOutputValues[2] + feedbackOutputValues[1];
+                feedbackValues[1] = -feedbackOutputValues[0] - feedbackOutputValues[3];
+                feedbackValues[2] = feedbackOutputValues[0] - feedbackOutputValues[3];
+                feedbackValues[3] = feedbackOutputValues[1] - feedbackOutputValues[2];
+
+                for (int i = 0; i < state.DecayDelays1.Length; i++)
+                {
+                    float temp = state.DecayDelays1[i].Update(tapOut * state.LateReverbGain + feedbackValues[i]);
+
+                    values[i] = state.DecayDelays2[i].Update(temp);
+
+                    state.FdnDelayLines[i].Update(values[i]);
+                }
+
+                for (int channelIndex = 0; channelIndex < targetOutputFeedbackIndicesTable.Length; channelIndex++)
+                {
+                    int targetOutputFeedbackIndex = targetOutputFeedbackIndicesTable[channelIndex];
+
+                    if (targetOutputFeedbackIndex >= 0)
+                    {
+                        outputBuffers[channelIndex].Span[sampleIndex] = (outputValues[channelIndex] + values[targetOutputFeedbackIndex] + channelInput[channelIndex] * state.DryGain);
+                    }
+                }
+
+                if (isMono)
+                {
+                    outputBuffers[0].Span[sampleIndex] += values[1];
+                }
+
+                if (isSurround)
+                {
+                    outputBuffers[4].Span[sampleIndex] += (outputValues[4] + state.BackLeftDelayLine.Update((values[2] - values[3]) * 0.5f) + channelInput[4] * state.DryGain);
+                }
+            }
+        }
+
+        public void ProcessReverb3d(CommandList context)
+        {
+            Debug.Assert(Parameter.IsChannelCountValid());
+
+            if (IsEffectEnabled && Parameter.IsChannelCountValid())
+            {
+                ReadOnlyMemory<float>[] inputBuffers = new ReadOnlyMemory<float>[Parameter.ChannelCount];
+                Memory<float>[] outputBuffers = new Memory<float>[Parameter.ChannelCount];
+
+                for (int i = 0; i < Parameter.ChannelCount; i++)
+                {
+                    inputBuffers[i] = context.GetBufferMemory(InputBufferIndices[i]);
+                    outputBuffers[i] = context.GetBufferMemory(OutputBufferIndices[i]);
+                }
+
+                switch (Parameter.ChannelCount)
+                {
+                    case 1:
+                        ProcessReverb3dMono(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    case 2:
+                        ProcessReverb3dStereo(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    case 4:
+                        ProcessReverb3dQuadraphonic(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    case 6:
+                        ProcessReverb3dSurround(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    default:
+                        throw new NotImplementedException($"{Parameter.ChannelCount}");
+                }
+            }
+            else
+            {
+                for (int i = 0; i < Parameter.ChannelCount; i++)
+                {
+                    if (InputBufferIndices[i] != OutputBufferIndices[i])
+                    {
+                        context.GetBufferMemory(InputBufferIndices[i]).CopyTo(context.GetBufferMemory(OutputBufferIndices[i]));
+                    }
+                }
+            }
+        }
+
+        public void Process(CommandList context)
+        {
+            ref Reverb3dState state = ref State.Span[0];
+
+            if (IsEffectEnabled)
+            {
+                if (Parameter.ParameterStatus == UsageState.Invalid)
+                {
+                    state = new Reverb3dState(ref _parameter, WorkBuffer);
+                }
+                else if (Parameter.ParameterStatus == UsageState.New)
+                {
+                    state.UpdateParameter(ref _parameter);
+                }
+            }
+
+            ProcessReverb3d(context);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/ReverbCommand.cs

@@ -0,0 +1,284 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Dsp.State;
+using Ryujinx.Audio.Renderer.Parameter.Effect;
+using System;
+using System.Diagnostics;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class ReverbCommand : ICommand
+    {
+        private static readonly int[] OutputEarlyIndicesTableMono = new int[10] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+        private static readonly int[] TargetEarlyDelayLineIndicesTableMono = new int[10] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
+        private static readonly int[] OutputIndicesTableMono = new int[4] { 0, 0, 0, 0 };
+        private static readonly int[] TargetOutputFeedbackIndicesTableMono = new int[4] { 0, 1, 2, 3 };
+
+        private static readonly int[] OutputEarlyIndicesTableStereo = new int[10] { 0, 0, 1, 1, 0, 1, 0, 0, 1, 1 };
+        private static readonly int[] TargetEarlyDelayLineIndicesTableStereo = new int[10] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
+        private static readonly int[] OutputIndicesTableStereo = new int[4] { 0, 0, 1, 1 };
+        private static readonly int[] TargetOutputFeedbackIndicesTableStereo = new int[4] { 2, 0, 3, 1 };
+
+        private static readonly int[] OutputEarlyIndicesTableQuadraphonic = new int[10] { 0, 0, 1, 1, 0, 1, 2, 2, 3, 3 };
+        private static readonly int[] TargetEarlyDelayLineIndicesTableQuadraphonic = new int[10] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
+        private static readonly int[] OutputIndicesTableQuadraphonic = new int[4] { 0, 1, 2, 3 };
+        private static readonly int[] TargetOutputFeedbackIndicesTableQuadraphonic = new int[4] { 0, 1, 2, 3 };
+
+        private static readonly int[] OutputEarlyIndicesTableSurround = new int[20] { 0, 5, 0, 5, 1, 5, 1, 5, 4, 5, 4, 5, 2, 5, 2, 5, 3, 5, 3, 5 };
+        private static readonly int[] TargetEarlyDelayLineIndicesTableSurround = new int[20] { 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9 };
+        private static readonly int[] OutputIndicesTableSurround = new int[Constants.ChannelCountMax] { 0, 1, 2, 3, 4, 5 };
+        private static readonly int[] TargetOutputFeedbackIndicesTableSurround = new int[Constants.ChannelCountMax] { 0, 1, 2, 3, -1, 3 };
+
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.Reverb;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ReverbParameter Parameter => _parameter;
+        public Memory<ReverbState> State { get; }
+        public ulong WorkBuffer { get; }
+        public ushort[] OutputBufferIndices { get; }
+        public ushort[] InputBufferIndices { get; }
+        public bool IsLongSizePreDelaySupported { get; }
+
+        public bool IsEffectEnabled { get; }
+
+        private ReverbParameter _parameter;
+
+        private const int FixedPointPrecision = 14;
+
+        public ReverbCommand(uint bufferOffset, ReverbParameter parameter, Memory<ReverbState> state, bool isEnabled, ulong workBuffer, int nodeId, bool isLongSizePreDelaySupported)
+        {
+            Enabled = true;
+            IsEffectEnabled = isEnabled;
+            NodeId = nodeId;
+            _parameter = parameter;
+            State = state;
+            WorkBuffer = workBuffer;
+
+            InputBufferIndices = new ushort[Constants.VoiceChannelCountMax];
+            OutputBufferIndices = new ushort[Constants.VoiceChannelCountMax];
+
+            for (int i = 0; i < Parameter.ChannelCount; i++)
+            {
+                InputBufferIndices[i] = (ushort)(bufferOffset + Parameter.Input[i]);
+                OutputBufferIndices[i] = (ushort)(bufferOffset + Parameter.Output[i]);
+            }
+
+            IsLongSizePreDelaySupported = isLongSizePreDelaySupported;
+        }
+
+        private void ProcessReverbMono(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ProcessReverbGeneric(outputBuffers,
+                     inputBuffers,
+                     sampleCount,
+                     OutputEarlyIndicesTableMono,
+                     TargetEarlyDelayLineIndicesTableMono,
+                     TargetOutputFeedbackIndicesTableMono,
+                     OutputIndicesTableMono);
+        }
+
+        private void ProcessReverbStereo(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ProcessReverbGeneric(outputBuffers,
+                     inputBuffers,
+                     sampleCount,
+                     OutputEarlyIndicesTableStereo,
+                     TargetEarlyDelayLineIndicesTableStereo,
+                     TargetOutputFeedbackIndicesTableStereo,
+                     OutputIndicesTableStereo);
+        }
+
+        private void ProcessReverbQuadraphonic(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ProcessReverbGeneric(outputBuffers,
+                     inputBuffers,
+                     sampleCount,
+                     OutputEarlyIndicesTableQuadraphonic,
+                     TargetEarlyDelayLineIndicesTableQuadraphonic,
+                     TargetOutputFeedbackIndicesTableQuadraphonic,
+                     OutputIndicesTableQuadraphonic);
+        }
+
+        private void ProcessReverbSurround(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount)
+        {
+            ProcessReverbGeneric(outputBuffers,
+                     inputBuffers,
+                     sampleCount,
+                     OutputEarlyIndicesTableSurround,
+                     TargetEarlyDelayLineIndicesTableSurround,
+                     TargetOutputFeedbackIndicesTableSurround,
+                     OutputIndicesTableSurround);
+        }
+
+        private void ProcessReverbGeneric(Memory<float>[] outputBuffers, ReadOnlyMemory<float>[] inputBuffers, uint sampleCount, ReadOnlySpan<int> outputEarlyIndicesTable, ReadOnlySpan<int> targetEarlyDelayLineIndicesTable, ReadOnlySpan<int> targetOutputFeedbackIndicesTable, ReadOnlySpan<int> outputIndicesTable)
+        {
+            ref ReverbState state = ref State.Span[0];
+
+            bool isSurround = Parameter.ChannelCount == 6;
+
+            float reverbGain = FixedPointHelper.ToFloat(Parameter.ReverbGain, FixedPointPrecision);
+            float lateGain = FixedPointHelper.ToFloat(Parameter.LateGain, FixedPointPrecision);
+            float outGain = FixedPointHelper.ToFloat(Parameter.OutGain, FixedPointPrecision);
+            float dryGain = FixedPointHelper.ToFloat(Parameter.DryGain, FixedPointPrecision);
+
+            float[] outputValues = new float[Constants.ChannelCountMax];
+            float[] feedbackValues = new float[4];
+            float[] feedbackOutputValues = new float[4];
+            float[] channelInput = new float[Parameter.ChannelCount];
+
+            for (int sampleIndex = 0; sampleIndex < sampleCount; sampleIndex++)
+            {
+                outputValues.AsSpan().Fill(0);
+
+                for (int i = 0; i < targetEarlyDelayLineIndicesTable.Length; i++)
+                {
+                    int earlyDelayIndex = targetEarlyDelayLineIndicesTable[i];
+                    int outputIndex = outputEarlyIndicesTable[i];
+
+                    float tapOutput = state.PreDelayLine.TapUnsafe(state.EarlyDelayTime[earlyDelayIndex], 0);
+
+                    outputValues[outputIndex] += tapOutput * state.EarlyGain[earlyDelayIndex];
+                }
+
+                if (isSurround)
+                {
+                    outputValues[5] *= 0.2f;
+                }
+
+                float targetPreDelayValue = 0;
+
+                for (int channelIndex = 0; channelIndex < Parameter.ChannelCount; channelIndex++)
+                {
+                    channelInput[channelIndex] = inputBuffers[channelIndex].Span[sampleIndex] * 64;
+                    targetPreDelayValue += channelInput[channelIndex] * reverbGain;
+                }
+
+                state.PreDelayLine.Update(targetPreDelayValue);
+
+                float lateValue = state.PreDelayLine.Tap(state.PreDelayLineDelayTime) * lateGain;
+
+                for (int i = 0; i < state.FdnDelayLines.Length; i++)
+                {
+                    feedbackOutputValues[i] = state.FdnDelayLines[i].Read() * state.HighFrequencyDecayDirectGain[i] + state.PreviousFeedbackOutput[i] * state.HighFrequencyDecayPreviousGain[i];
+                    state.PreviousFeedbackOutput[i] = feedbackOutputValues[i];
+                }
+
+                feedbackValues[0] = feedbackOutputValues[2] + feedbackOutputValues[1];
+                feedbackValues[1] = -feedbackOutputValues[0] - feedbackOutputValues[3];
+                feedbackValues[2] = feedbackOutputValues[0] - feedbackOutputValues[3];
+                feedbackValues[3] = feedbackOutputValues[1] - feedbackOutputValues[2];
+
+                for (int i = 0; i < state.FdnDelayLines.Length; i++)
+                {
+                    feedbackOutputValues[i] = state.DecayDelays[i].Update(feedbackValues[i] + lateValue);
+                    state.FdnDelayLines[i].Update(feedbackOutputValues[i]);
+                }
+
+                for (int i = 0; i < targetOutputFeedbackIndicesTable.Length; i++)
+                {
+                    int targetOutputFeedbackIndex = targetOutputFeedbackIndicesTable[i];
+                    int outputIndex = outputIndicesTable[i];
+
+                    if (targetOutputFeedbackIndex >= 0)
+                    {
+                        outputValues[outputIndex] += feedbackOutputValues[targetOutputFeedbackIndex];
+                    }
+                }
+
+                if (isSurround)
+                {
+                    outputValues[4] += state.BackLeftDelayLine.Update((feedbackOutputValues[2] - feedbackOutputValues[3]) * 0.5f);
+                }
+
+                for (int channelIndex = 0; channelIndex < Parameter.ChannelCount; channelIndex++)
+                {
+                    outputBuffers[channelIndex].Span[sampleIndex] = (outputValues[channelIndex] * outGain + channelInput[channelIndex] * dryGain) / 64;
+                }
+            }
+        }
+
+        private void ProcessReverb(CommandList context)
+        {
+            Debug.Assert(Parameter.IsChannelCountValid());
+
+            if (IsEffectEnabled && Parameter.IsChannelCountValid())
+            {
+                ReadOnlyMemory<float>[] inputBuffers = new ReadOnlyMemory<float>[Parameter.ChannelCount];
+                Memory<float>[] outputBuffers = new Memory<float>[Parameter.ChannelCount];
+
+                for (int i = 0; i < Parameter.ChannelCount; i++)
+                {
+                    inputBuffers[i] = context.GetBufferMemory(InputBufferIndices[i]);
+                    outputBuffers[i] = context.GetBufferMemory(OutputBufferIndices[i]);
+                }
+
+                switch (Parameter.ChannelCount)
+                {
+                    case 1:
+                        ProcessReverbMono(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    case 2:
+                        ProcessReverbStereo(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    case 4:
+                        ProcessReverbQuadraphonic(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    case 6:
+                        ProcessReverbSurround(outputBuffers, inputBuffers, context.SampleCount);
+                        break;
+                    default:
+                        throw new NotImplementedException($"{Parameter.ChannelCount}");
+                }
+            }
+            else
+            {
+                for (int i = 0; i < Parameter.ChannelCount; i++)
+                {
+                    if (InputBufferIndices[i] != OutputBufferIndices[i])
+                    {
+                        context.GetBufferMemory(InputBufferIndices[i]).CopyTo(context.GetBufferMemory(OutputBufferIndices[i]));
+                    }
+                }
+            }
+        }
+
+        public void Process(CommandList context)
+        {
+            ref ReverbState state = ref State.Span[0];
+
+            if (IsEffectEnabled)
+            {
+                if (Parameter.Status == Server.Effect.UsageState.Invalid)
+                {
+                    state = new ReverbState(ref _parameter, WorkBuffer, IsLongSizePreDelaySupported);
+                }
+                else if (Parameter.Status == Server.Effect.UsageState.New)
+                {
+                    state.UpdateParameter(ref _parameter);
+                }
+            }
+
+            ProcessReverb(context);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/UpsampleCommand.cs

@@ -0,0 +1,87 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Server.Upsampler;
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class UpsampleCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.Upsample;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public uint BufferCount { get; }
+        public uint InputBufferIndex { get; }
+        public uint InputSampleCount { get; }
+        public uint InputSampleRate { get; }
+
+        public UpsamplerState UpsamplerInfo { get; }
+
+        public Memory<float> OutBuffer { get; }
+
+        public UpsampleCommand(uint bufferOffset, UpsamplerState info, uint inputCount, Span<byte> inputBufferOffset, uint bufferCount, uint sampleCount, uint sampleRate, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            InputBufferIndex = 0;
+            OutBuffer = info.OutputBuffer;
+            BufferCount = bufferCount;
+            InputSampleCount = sampleCount;
+            InputSampleRate = sampleRate;
+            info.SourceSampleCount = inputCount;
+            info.InputBufferIndices = new ushort[inputCount];
+
+            for (int i = 0; i < inputCount; i++)
+            {
+                info.InputBufferIndices[i] = (ushort)(bufferOffset + inputBufferOffset[i]);
+            }
+
+            UpsamplerInfo = info;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private Span<float> GetBuffer(int index, int sampleCount)
+        {
+            return UpsamplerInfo.OutputBuffer.Span.Slice(index * sampleCount, sampleCount);
+        }
+
+        public void Process(CommandList context)
+        {
+            float ratio = (float)InputSampleRate / Constants.TargetSampleRate;
+
+            uint bufferCount = Math.Min(BufferCount, UpsamplerInfo.SourceSampleCount);
+
+            for (int i = 0; i < bufferCount; i++)
+            {
+                Span<float> inputBuffer = context.GetBuffer(UpsamplerInfo.InputBufferIndices[i]);
+                Span<float> outputBuffer = GetBuffer(UpsamplerInfo.InputBufferIndices[i], (int)UpsamplerInfo.SampleCount);
+
+                float fraction = 0.0f;
+
+                ResamplerHelper.ResampleForUpsampler(outputBuffer, inputBuffer, ratio, ref fraction, (int)(InputSampleCount / ratio));
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/VolumeCommand.cs

@@ -0,0 +1,125 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Runtime.Intrinsics;
+using System.Runtime.Intrinsics.X86;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class VolumeCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.Volume;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort InputBufferIndex { get; }
+        public ushort OutputBufferIndex { get; }
+
+        public float Volume { get; }
+
+        public VolumeCommand(float volume, uint bufferIndex, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            InputBufferIndex = (ushort)bufferIndex;
+            OutputBufferIndex = (ushort)bufferIndex;
+
+            Volume = volume;
+        }
+
+        private void ProcessVolumeAvx(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer)
+        {
+            Vector256<float> volumeVec = Vector256.Create(Volume);
+
+            ReadOnlySpan<Vector256<float>> inputVec = MemoryMarshal.Cast<float, Vector256<float>>(inputBuffer);
+            Span<Vector256<float>> outputVec = MemoryMarshal.Cast<float, Vector256<float>>(outputBuffer);
+
+            int sisdStart = inputVec.Length * 8;
+
+            for (int i = 0; i < inputVec.Length; i++)
+            {
+                outputVec[i] = Avx.Ceiling(Avx.Multiply(inputVec[i], volumeVec));
+            }
+
+            for (int i = sisdStart; i < inputBuffer.Length; i++)
+            {
+                outputBuffer[i] = FloatingPointHelper.MultiplyRoundUp(inputBuffer[i], Volume);
+            }
+        }
+
+        private void ProcessVolumeSse41(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer)
+        {
+            Vector128<float> volumeVec = Vector128.Create(Volume);
+
+            ReadOnlySpan<Vector128<float>> inputVec = MemoryMarshal.Cast<float, Vector128<float>>(inputBuffer);
+            Span<Vector128<float>> outputVec = MemoryMarshal.Cast<float, Vector128<float>>(outputBuffer);
+
+            int sisdStart = inputVec.Length * 4;
+
+            for (int i = 0; i < inputVec.Length; i++)
+            {
+                outputVec[i] = Sse41.Ceiling(Sse.Multiply(inputVec[i], volumeVec));
+            }
+
+            for (int i = sisdStart; i < inputBuffer.Length; i++)
+            {
+                outputBuffer[i] = FloatingPointHelper.MultiplyRoundUp(inputBuffer[i], Volume);
+            }
+        }
+
+        private void ProcessVolume(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer)
+        {
+            if (Avx.IsSupported)
+            {
+                ProcessVolumeAvx(outputBuffer, inputBuffer);
+            }
+            else if (Sse41.IsSupported)
+            {
+                ProcessVolumeSse41(outputBuffer, inputBuffer);
+            }
+            else
+            {
+                ProcessVolumeSlowPath(outputBuffer, inputBuffer);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private void ProcessVolumeSlowPath(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer)
+        {
+            for (int i = 0; i < outputBuffer.Length; i++)
+            {
+                outputBuffer[i] = FloatingPointHelper.MultiplyRoundUp(inputBuffer[i], Volume);
+            }
+        }
+
+        public void Process(CommandList context)
+        {
+            ReadOnlySpan<float> inputBuffer = context.GetBuffer(InputBufferIndex);
+            Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
+
+            ProcessVolume(outputBuffer, inputBuffer);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Command/VolumeRampCommand.cs

@@ -0,0 +1,71 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Command
+{
+    public class VolumeRampCommand : ICommand
+    {
+        public bool Enabled { get; set; }
+
+        public int NodeId { get; }
+
+        public CommandType CommandType => CommandType.VolumeRamp;
+
+        public ulong EstimatedProcessingTime { get; set; }
+
+        public ushort InputBufferIndex { get; }
+        public ushort OutputBufferIndex { get; }
+
+        public float Volume0 { get; }
+        public float Volume1 { get; }
+
+        public VolumeRampCommand(float volume0, float volume1, uint bufferIndex, int nodeId)
+        {
+            Enabled = true;
+            NodeId = nodeId;
+
+            InputBufferIndex = (ushort)bufferIndex;
+            OutputBufferIndex = (ushort)bufferIndex;
+
+            Volume0 = volume0;
+            Volume1 = volume1;
+        }
+
+        private void ProcessVolumeRamp(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer, int sampleCount)
+        {
+            float ramp = (Volume1 - Volume0) / sampleCount;
+
+            float volume = Volume0;
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                outputBuffer[i] = FloatingPointHelper.MultiplyRoundUp(inputBuffer[i], volume);
+                volume += ramp;
+            }
+        }
+
+        public void Process(CommandList context)
+        {
+            ReadOnlySpan<float> inputBuffer = context.GetBuffer(InputBufferIndex);
+            Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
+
+            ProcessVolumeRamp(outputBuffer, inputBuffer, (int)context.SampleCount);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/DataSourceHelper.cs

@@ -0,0 +1,409 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Common;
+using Ryujinx.Audio.Renderer.Common;
+using Ryujinx.Audio.Renderer.Dsp.State;
+using Ryujinx.Common.Logging;
+using Ryujinx.Memory;
+using System;
+using System.Buffers;
+using System.Diagnostics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Runtime.Intrinsics;
+using System.Runtime.Intrinsics.X86;
+using static Ryujinx.Audio.Renderer.Parameter.VoiceInParameter;
+
+namespace Ryujinx.Audio.Renderer.Dsp
+{
+    public static class DataSourceHelper
+    {
+        private const int FixedPointPrecision = 15;
+
+        public class WaveBufferInformation
+        {
+            public Memory<VoiceUpdateState> State;
+            public uint SourceSampleRate;
+            public SampleFormat SampleFormat;
+            public float Pitch;
+            public DecodingBehaviour DecodingBehaviour;
+            public WaveBuffer[] WaveBuffers;
+            public ulong ExtraParameter;
+            public ulong ExtraParameterSize;
+            public int ChannelIndex;
+            public int ChannelCount;
+            public SampleRateConversionQuality SrcQuality;
+        }
+
+        private static int GetPitchLimitBySrcQuality(SampleRateConversionQuality quality)
+        {
+            switch (quality)
+            {
+                case SampleRateConversionQuality.Default:
+                case SampleRateConversionQuality.Low:
+                    return 4;
+                case SampleRateConversionQuality.High:
+                    return 8;
+                default:
+                    throw new ArgumentException($"{quality}");
+            }
+        }
+
+        public static void ProcessWaveBuffers(IVirtualMemoryManager memoryManager, Span<float> outputBuffer, WaveBufferInformation info, uint targetSampleRate, int sampleCount)
+        {
+            const int tempBufferSize = 0x3F00;
+
+            ref VoiceUpdateState state = ref info.State.Span[0];
+
+            short[] tempBuffer = ArrayPool<short>.Shared.Rent(tempBufferSize);
+
+            float sampleRateRatio = ((float)info.SourceSampleRate / targetSampleRate * info.Pitch);
+
+            float fraction = state.Fraction;
+            int waveBufferIndex = (int)state.WaveBufferIndex;
+            ulong playedSampleCount = state.PlayedSampleCount;
+            int offset = state.Offset;
+            uint waveBufferConsumed = state.WaveBufferConsumed;
+
+            int pitchMaxLength = GetPitchLimitBySrcQuality(info.SrcQuality);
+
+            int totalNeededSize = (int)MathF.Truncate(fraction + sampleRateRatio * sampleCount);
+
+            if (totalNeededSize + pitchMaxLength <= tempBufferSize && totalNeededSize >= 0)
+            {
+                int sourceSampleCountToProcess = sampleCount;
+
+                int maxSampleCountPerIteration = Math.Min((int)MathF.Truncate((tempBufferSize - fraction) / sampleRateRatio), sampleCount);
+
+                bool isStarving = false;
+
+                int i = 0;
+
+                while (i < sourceSampleCountToProcess)
+                {
+                    int tempBufferIndex = 0;
+
+                    if (!info.DecodingBehaviour.HasFlag(DecodingBehaviour.SkipPitchAndSampleRateConversion))
+                    {
+                        state.Pitch.ToSpan().Slice(0, pitchMaxLength).CopyTo(tempBuffer.AsSpan());
+                        tempBufferIndex += pitchMaxLength;
+                    }
+
+                    int sampleCountToProcess = Math.Min(sourceSampleCountToProcess, maxSampleCountPerIteration);
+
+                    int y = 0;
+
+                    int sampleCountToDecode = (int)MathF.Truncate(fraction + sampleRateRatio * sampleCountToProcess);
+
+                    while (y < sampleCountToDecode)
+                    {
+                        if (waveBufferIndex >= Constants.VoiceWaveBufferCount)
+                        {
+                            Logger.Error?.Print(LogClass.AudioRenderer, $"Invalid WaveBuffer index {waveBufferIndex}");
+
+                            waveBufferIndex = 0;
+                            playedSampleCount = 0;
+                        }
+
+                        if (!state.IsWaveBufferValid[waveBufferIndex])
+                        {
+                            isStarving = true;
+                            break;
+                        }
+
+                        ref WaveBuffer waveBuffer = ref info.WaveBuffers[waveBufferIndex];
+
+                        if (offset == 0 && info.SampleFormat == SampleFormat.Adpcm && waveBuffer.Context != 0)
+                        {
+                            state.LoopContext = memoryManager.Read<AdpcmLoopContext>(waveBuffer.Context);
+                        }
+
+                        Span<short> tempSpan = tempBuffer.AsSpan().Slice(tempBufferIndex + y);
+
+                        int decodedSampleCount = -1;
+
+                        int targetSampleStartOffset;
+                        int targetSampleEndOffset;
+
+                        if (state.LoopCount > 0 && waveBuffer.LoopStartSampleOffset != 0 && waveBuffer.LoopEndSampleOffset != 0 && waveBuffer.LoopStartSampleOffset <= waveBuffer.LoopEndSampleOffset)
+                        {
+                            targetSampleStartOffset = (int)waveBuffer.LoopStartSampleOffset;
+                            targetSampleEndOffset = (int)waveBuffer.LoopEndSampleOffset;
+                        }
+                        else
+                        {
+                            targetSampleStartOffset = (int)waveBuffer.StartSampleOffset;
+                            targetSampleEndOffset = (int)waveBuffer.EndSampleOffset;
+                        }
+
+                        int targetWaveBufferSampleCount = targetSampleEndOffset - targetSampleStartOffset;
+
+                        switch (info.SampleFormat)
+                        {
+                            case SampleFormat.Adpcm:
+                                ReadOnlySpan<byte> waveBufferAdpcm = ReadOnlySpan<byte>.Empty;
+
+                                if (waveBuffer.Buffer != 0 && waveBuffer.BufferSize != 0)
+                                {
+                                    // TODO: we are possibly copying a lot of unneeded data here, we should only take what we need.
+                                    waveBufferAdpcm = memoryManager.GetSpan(waveBuffer.Buffer, (int)waveBuffer.BufferSize);
+                                }
+
+                                ReadOnlySpan<short> coefficients = MemoryMarshal.Cast<byte, short>(memoryManager.GetSpan(info.ExtraParameter, (int)info.ExtraParameterSize));
+                                decodedSampleCount = AdpcmHelper.Decode(tempSpan, waveBufferAdpcm, targetSampleStartOffset, targetSampleEndOffset, offset, sampleCountToDecode - y, coefficients, ref state.LoopContext);
+                                break;
+                            case SampleFormat.PcmInt16:
+                                ReadOnlySpan<short> waveBufferPcm16 = ReadOnlySpan<short>.Empty;
+
+                                if (waveBuffer.Buffer != 0 && waveBuffer.BufferSize != 0)
+                                {
+                                    ulong bufferOffset = waveBuffer.Buffer + PcmHelper.GetBufferOffset<short>(targetSampleStartOffset, offset, info.ChannelCount);
+                                    int bufferSize = PcmHelper.GetBufferSize<short>(targetSampleStartOffset, targetSampleEndOffset, offset, sampleCountToDecode - y) * info.ChannelCount;
+
+                                    waveBufferPcm16 = MemoryMarshal.Cast<byte, short>(memoryManager.GetSpan(bufferOffset, bufferSize));
+                                }
+
+                                decodedSampleCount = PcmHelper.Decode(tempSpan, waveBufferPcm16, targetSampleStartOffset, targetSampleEndOffset, info.ChannelIndex, info.ChannelCount);
+                                break;
+                            case SampleFormat.PcmFloat:
+                                ReadOnlySpan<float> waveBufferPcmFloat = ReadOnlySpan<float>.Empty;
+
+                                if (waveBuffer.Buffer != 0 && waveBuffer.BufferSize != 0)
+                                {
+                                    ulong bufferOffset = waveBuffer.Buffer + PcmHelper.GetBufferOffset<float>(targetSampleStartOffset, offset, info.ChannelCount);
+                                    int bufferSize = PcmHelper.GetBufferSize<float>(targetSampleStartOffset, targetSampleEndOffset, offset, sampleCountToDecode - y) * info.ChannelCount;
+
+                                    waveBufferPcmFloat = MemoryMarshal.Cast<byte, float>(memoryManager.GetSpan(bufferOffset, bufferSize));
+                                }
+
+                                decodedSampleCount = PcmHelper.Decode(tempSpan, waveBufferPcmFloat, targetSampleStartOffset, targetSampleEndOffset, info.ChannelIndex, info.ChannelCount);
+                                break;
+                            default:
+                                Logger.Warning?.Print(LogClass.AudioRenderer, $"Unsupported sample format {info.SampleFormat}");
+                                break;
+                        }
+
+                        Debug.Assert(decodedSampleCount <= sampleCountToDecode);
+
+                        if (decodedSampleCount < 0)
+                        {
+                            Logger.Warning?.Print(LogClass.AudioRenderer, $"Decoding failed, skipping WaveBuffer");
+
+                            state.MarkEndOfBufferWaveBufferProcessing(ref waveBuffer, ref waveBufferIndex, ref waveBufferConsumed, ref playedSampleCount);
+                            decodedSampleCount = 0;
+                        }
+
+                        y += decodedSampleCount;
+                        offset += decodedSampleCount;
+                        playedSampleCount += (uint)decodedSampleCount;
+
+                        if (offset >= targetWaveBufferSampleCount || decodedSampleCount == 0)
+                        {
+                            offset = 0;
+
+                            if (waveBuffer.Looping)
+                            {
+                                state.LoopCount++;
+
+                                if (waveBuffer.LoopCount >= 0)
+                                {
+                                    if (decodedSampleCount == 0 || state.LoopCount > waveBuffer.LoopCount)
+                                    {
+                                        state.MarkEndOfBufferWaveBufferProcessing(ref waveBuffer, ref waveBufferIndex, ref waveBufferConsumed, ref playedSampleCount);
+                                    }
+                                }
+
+                                if (decodedSampleCount == 0)
+                                {
+                                    isStarving = true;
+                                    break;
+                                }
+
+                                if (info.DecodingBehaviour.HasFlag(DecodingBehaviour.PlayedSampleCountResetWhenLooping))
+                                {
+                                    playedSampleCount = 0;
+                                }
+                            }
+                            else
+                            {
+                                state.MarkEndOfBufferWaveBufferProcessing(ref waveBuffer, ref waveBufferIndex, ref waveBufferConsumed, ref playedSampleCount);
+                            }
+                        }
+                    }
+
+                    Span<float> outputSpan = outputBuffer.Slice(i);
+                    Span<int> outputSpanInt = MemoryMarshal.Cast<float, int>(outputSpan);
+
+                    if (info.DecodingBehaviour.HasFlag(DecodingBehaviour.SkipPitchAndSampleRateConversion))
+                    {
+                        for (int j = 0; j < y; j++)
+                        {
+                            outputBuffer[j] = tempBuffer[j];
+                        }
+                    }
+                    else
+                    {
+                        Span<short> tempSpan = tempBuffer.AsSpan().Slice(tempBufferIndex + y);
+
+                        tempSpan.Slice(0, sampleCountToDecode - y).Fill(0);
+
+                        ToFloat(outputBuffer, outputSpanInt, sampleCountToProcess);
+
+                        ResamplerHelper.Resample(outputBuffer, tempBuffer, sampleRateRatio, ref fraction, sampleCountToProcess, info.SrcQuality, y != sourceSampleCountToProcess || info.Pitch != 1.0f);
+
+                        tempBuffer.AsSpan().Slice(sampleCountToDecode, pitchMaxLength).CopyTo(state.Pitch.ToSpan());
+                    }
+
+                    i += sampleCountToProcess;
+                }
+
+                Debug.Assert(sourceSampleCountToProcess == i || !isStarving);
+
+                state.WaveBufferConsumed = waveBufferConsumed;
+                state.Offset = offset;
+                state.PlayedSampleCount = playedSampleCount;
+                state.WaveBufferIndex = (uint)waveBufferIndex;
+                state.Fraction = fraction;
+            }
+
+            ArrayPool<short>.Shared.Return(tempBuffer);
+        }
+
+        private static void ToFloatAvx(Span<float> output, ReadOnlySpan<int> input, int sampleCount)
+        {
+            ReadOnlySpan<Vector256<int>> inputVec = MemoryMarshal.Cast<int, Vector256<int>>(input);
+            Span<Vector256<float>> outputVec = MemoryMarshal.Cast<float, Vector256<float>>(output);
+
+            int sisdStart = inputVec.Length * 8;
+
+            for (int i = 0; i < inputVec.Length; i++)
+            {
+                outputVec[i] = Avx.ConvertToVector256Single(inputVec[i]);
+            }
+
+            for (int i = sisdStart; i < sampleCount; i++)
+            {
+                output[i] = input[i];
+            }
+        }
+
+        private static void ToFloatSse2(Span<float> output, ReadOnlySpan<int> input, int sampleCount)
+        {
+            ReadOnlySpan<Vector128<int>> inputVec = MemoryMarshal.Cast<int, Vector128<int>>(input);
+            Span<Vector128<float>> outputVec = MemoryMarshal.Cast<float, Vector128<float>>(output);
+
+            int sisdStart = inputVec.Length * 4;
+
+            for (int i = 0; i < inputVec.Length; i++)
+            {
+                outputVec[i] = Sse2.ConvertToVector128Single(inputVec[i]);
+            }
+
+            for (int i = sisdStart; i < sampleCount; i++)
+            {
+                output[i] = input[i];
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void ToFloatSlow(Span<float> output, ReadOnlySpan<int> input, int sampleCount)
+        {
+            for (int i = 0; i < sampleCount; i++)
+            {
+                output[i] = input[i];
+            }
+        }
+
+        public static void ToFloat(Span<float> output, ReadOnlySpan<int> input, int sampleCount)
+        {
+            if (Avx.IsSupported)
+            {
+                ToFloatAvx(output, input, sampleCount);
+            }
+            else if (Sse2.IsSupported)
+            {
+                ToFloatSse2(output, input, sampleCount);
+            }
+            else
+            {
+                ToFloatSlow(output, input, sampleCount);
+            }
+        }
+
+        public static void ToIntAvx(Span<int> output, ReadOnlySpan<float> input, int sampleCount)
+        {
+            ReadOnlySpan<Vector256<float>> inputVec = MemoryMarshal.Cast<float, Vector256<float>>(input);
+            Span<Vector256<int>> outputVec = MemoryMarshal.Cast<int, Vector256<int>>(output);
+
+            int sisdStart = inputVec.Length * 8;
+
+            for (int i = 0; i < inputVec.Length; i++)
+            {
+                outputVec[i] = Avx.ConvertToVector256Int32(inputVec[i]);
+            }
+
+            for (int i = sisdStart; i < sampleCount; i++)
+            {
+                output[i] = (int)input[i];
+            }
+        }
+
+        public static void ToIntSse2(Span<int> output, ReadOnlySpan<float> input, int sampleCount)
+        {
+            ReadOnlySpan<Vector128<float>> inputVec = MemoryMarshal.Cast<float, Vector128<float>>(input);
+            Span<Vector128<int>> outputVec = MemoryMarshal.Cast<int, Vector128<int>>(output);
+
+            int sisdStart = inputVec.Length * 4;
+
+            for (int i = 0; i < inputVec.Length; i++)
+            {
+                outputVec[i] = Avx.ConvertToVector128Int32(inputVec[i]);
+            }
+
+            for (int i = sisdStart; i < sampleCount; i++)
+            {
+                output[i] = (int)input[i];
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void ToIntSlow(Span<int> output, ReadOnlySpan<float> input, int sampleCount)
+        {
+            for (int i = 0; i < sampleCount; i++)
+            {
+                output[i] = (int)input[i];
+            }
+        }
+
+        public static void ToInt(Span<int> output, ReadOnlySpan<float> input, int sampleCount)
+        {
+            if (Avx.IsSupported)
+            {
+                ToIntAvx(output, input, sampleCount);
+            }
+            else if (Sse2.IsSupported)
+            {
+                ToIntSse2(output, input, sampleCount);
+            }
+            else
+            {
+                ToIntSlow(output, input, sampleCount);
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Effect/DecayDelay.cs

@@ -0,0 +1,69 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+namespace Ryujinx.Audio.Renderer.Dsp.Effect
+{
+    public class DecayDelay : IDelayLine
+    {
+        private readonly IDelayLine _delayLine;
+
+        public uint CurrentSampleCount => _delayLine.CurrentSampleCount;
+
+        public uint SampleCountMax => _delayLine.SampleCountMax;
+
+        private float _decayRate;
+
+        public DecayDelay(IDelayLine delayLine)
+        {
+            _decayRate = 0.0f;
+            _delayLine = delayLine;
+        }
+
+        public void SetDecayRate(float decayRate)
+        {
+            _decayRate = decayRate;
+        }
+
+        public float Update(float value)
+        {
+            float delayLineValue = _delayLine.Read();
+            float processedValue = value - (_decayRate * delayLineValue);
+
+            return _delayLine.Update(processedValue) + processedValue * _decayRate;
+        }
+
+        public void SetDelay(float delayTime)
+        {
+            _delayLine.SetDelay(delayTime);
+        }
+
+        public float Read()
+        {
+            return _delayLine.Read();
+        }
+
+        public float TapUnsafe(uint sampleIndex, int offset)
+        {
+            return _delayLine.TapUnsafe(sampleIndex, offset);
+        }
+
+        public float Tap(uint sampleIndex)
+        {
+            return _delayLine.Tap(sampleIndex);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Effect/DelayLine.cs

@@ -0,0 +1,95 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Effect
+{
+    public class DelayLine : IDelayLine
+    {
+        private float[] _workBuffer;
+        private uint _sampleRate;
+        private uint _currentSampleIndex;
+        private uint _lastSampleIndex;
+
+        public uint CurrentSampleCount { get; private set; }
+        public uint SampleCountMax { get; private set; }
+
+        public DelayLine(uint sampleRate, float delayTimeMax)
+        {
+            _sampleRate = sampleRate;
+            SampleCountMax = IDelayLine.GetSampleCount(_sampleRate, delayTimeMax);
+            _workBuffer = new float[SampleCountMax];
+
+            SetDelay(delayTimeMax);
+        }
+
+        private void ConfigureDelay(uint targetSampleCount)
+        {
+            CurrentSampleCount = Math.Min(SampleCountMax, targetSampleCount);
+            _currentSampleIndex = 0;
+
+            if (CurrentSampleCount == 0)
+            {
+                _lastSampleIndex = 0;
+            }
+            else
+            {
+                _lastSampleIndex = CurrentSampleCount - 1;
+            }
+        }
+
+        public void SetDelay(float delayTime)
+        {
+            ConfigureDelay(IDelayLine.GetSampleCount(_sampleRate, delayTime));
+        }
+
+        public float Read()
+        {
+            return _workBuffer[_currentSampleIndex];
+        }
+
+        public float Update(float value)
+        {
+            float output = Read();
+
+            _workBuffer[_currentSampleIndex++] = value;
+
+            if (_currentSampleIndex >= _lastSampleIndex)
+            {
+                _currentSampleIndex = 0;
+            }
+
+            return output;
+        }
+
+        public float TapUnsafe(uint sampleIndex, int offset)
+        {
+            return IDelayLine.Tap(_workBuffer, (int)_currentSampleIndex, (int)sampleIndex + offset, (int)CurrentSampleCount);
+        }
+
+        public float Tap(uint sampleIndex)
+        {
+            if (sampleIndex >= CurrentSampleCount)
+            {
+                sampleIndex = CurrentSampleCount - 1;
+            }
+
+            return TapUnsafe(sampleIndex, -1);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Effect/DelayLineReverb3d.cs

@@ -0,0 +1,93 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System.Diagnostics;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Effect
+{
+    public class DelayLine3d : IDelayLine
+    {
+        private float[] _workBuffer;
+        private uint _sampleRate;
+        private uint _currentSampleIndex;
+        private uint _lastSampleIndex;
+
+        public uint CurrentSampleCount { get; private set; }
+        public uint SampleCountMax { get; private set; }
+
+        public DelayLine3d(uint sampleRate, float delayTimeMax)
+        {
+            _sampleRate = sampleRate;
+            SampleCountMax = IDelayLine.GetSampleCount(_sampleRate, delayTimeMax);
+            _workBuffer = new float[SampleCountMax + 1];
+
+            SetDelay(delayTimeMax);
+        }
+
+        private void ConfigureDelay(uint targetSampleCount)
+        {
+            if (SampleCountMax >= targetSampleCount)
+            {
+                CurrentSampleCount = targetSampleCount;
+                _lastSampleIndex = (_currentSampleIndex + targetSampleCount) % (SampleCountMax + 1);
+            }
+        }
+
+        public void SetDelay(float delayTime)
+        {
+            ConfigureDelay(IDelayLine.GetSampleCount(_sampleRate, delayTime));
+        }
+
+        public float Read()
+        {
+            return _workBuffer[_currentSampleIndex];
+        }
+
+        public float Update(float value)
+        {
+            Debug.Assert(!float.IsNaN(value) && !float.IsInfinity(value));
+
+            _workBuffer[_lastSampleIndex++] = value;
+
+            float output = Read();
+
+            _currentSampleIndex++;
+
+            if (_currentSampleIndex >= SampleCountMax)
+            {
+                _currentSampleIndex = 0;
+            }
+
+            if (_lastSampleIndex >= SampleCountMax)
+            {
+                _lastSampleIndex = 0;
+            }
+
+            return output;
+        }
+
+        public float TapUnsafe(uint sampleIndex, int offset)
+        {
+            return IDelayLine.Tap(_workBuffer, (int)_lastSampleIndex, (int)sampleIndex + offset, (int)SampleCountMax + 1);
+        }
+
+        public float Tap(uint sampleIndex)
+        {
+            return TapUnsafe(sampleIndex, -1);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/Effect/IDelayLine.cs

@@ -0,0 +1,53 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp.Effect
+{
+    public interface IDelayLine
+    {
+        uint CurrentSampleCount { get; }
+        uint SampleCountMax { get; }
+
+        void SetDelay(float delayTime);
+        float Read();
+        float Update(float value);
+
+        float TapUnsafe(uint sampleIndex, int offset);
+        float Tap(uint sampleIndex);
+
+        public static float Tap(Span<float> workBuffer, int baseIndex, int sampleIndex, int delaySampleCount)
+        {
+            int targetIndex = baseIndex - sampleIndex;
+
+            if (targetIndex < 0)
+            {
+                targetIndex += delaySampleCount;
+            }
+
+            return workBuffer[targetIndex];
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static uint GetSampleCount(uint sampleRate, float delayTime)
+        {
+            return (uint)MathF.Round(sampleRate * delayTime);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/FixedPointHelper.cs

@@ -0,0 +1,50 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp
+{
+    public static class FixedPointHelper
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int ToInt(long value, int qBits)
+        {
+            return (int)(value >> qBits);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float ToFloat(long value, int qBits)
+        {
+            return (float)value / (1 << qBits);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int ToFixed(float value, int qBits)
+        {
+            return (int)(value * (1 << qBits));
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int RoundUpAndToInt(long value, int qBits)
+        {
+            int half = 1 << (qBits - 1);
+
+            return ToInt(value + half, qBits);
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/FloatingPointHelper.cs

@@ -0,0 +1,84 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp
+{
+    public static class FloatingPointHelper
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float MultiplyRoundDown(float a, float b)
+        {
+            return RoundDown(a * b);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float RoundDown(float a)
+        {
+            return MathF.Round(a, 0);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float RoundUp(float a)
+        {
+            return MathF.Round(a);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float MultiplyRoundUp(float a, float b)
+        {
+            return RoundUp(a * b);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float Pow10(float x)
+        {
+            // NOTE: Nintendo implementation uses Q15 and a LUT for this, we don't.
+            // As such, we support the same ranges as Nintendo to avoid unexpected behaviours.
+            if (x >= 0.0f)
+            {
+                return 1.0f;
+            }
+            else if (x <= -5.3f)
+            {
+                return 0.0f;
+            }
+
+            return MathF.Pow(10, x);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float DegreesToRadians(float degrees)
+        {
+            return degrees * MathF.PI / 180.0f;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float Cos(float value)
+        {
+            return MathF.Cos(DegreesToRadians(value));
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float Sin(float value)
+        {
+            return MathF.Sin(DegreesToRadians(value));
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/PcmHelper.cs

@@ -0,0 +1,95 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp
+{
+    public static class PcmHelper
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int GetCountToDecode(int startSampleOffset, int endSampleOffset, int offset, int count)
+        {
+            return Math.Min(count, endSampleOffset - startSampleOffset - offset);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static ulong GetBufferOffset<T>(int startSampleOffset, int offset, int channelCount) where T : unmanaged
+        {
+            return (ulong)(Unsafe.SizeOf<T>() * channelCount * (startSampleOffset + offset));
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int GetBufferSize<T>(int startSampleOffset, int endSampleOffset, int offset, int count) where T : unmanaged
+        {
+            return GetCountToDecode(startSampleOffset, endSampleOffset, offset, count) * Unsafe.SizeOf<T>();
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int Decode(Span<short> output, ReadOnlySpan<short> input, int startSampleOffset, int endSampleOffset, int channelIndex, int channelCount)
+        {
+            if (input.IsEmpty || endSampleOffset < startSampleOffset)
+            {
+                return 0;
+            }
+
+            int decodedCount = input.Length / channelCount;
+
+            for (int i = 0; i < decodedCount; i++)
+            {
+                output[i] = input[i * channelCount + channelIndex];
+            }
+
+            return decodedCount;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int Decode(Span<short> output, ReadOnlySpan<float> input, int startSampleOffset, int endSampleOffset, int channelIndex, int channelCount)
+        {
+            if (input.IsEmpty || endSampleOffset < startSampleOffset)
+            {
+                return 0;
+            }
+
+            int decodedCount = input.Length / channelCount;
+
+            for (int i = 0; i < decodedCount; i++)
+            {
+                output[i] = (short)(input[i * channelCount + channelIndex] * short.MaxValue);
+            }
+
+            return decodedCount;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static short Saturate(float value)
+        {
+            if (value > short.MaxValue)
+            {
+                return short.MaxValue;
+            }
+
+            if (value < short.MinValue)
+            {
+                return short.MinValue;
+            }
+
+            return (short)value;
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/ResamplerHelper.cs

@@ -0,0 +1,624 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Runtime.Intrinsics;
+using System.Runtime.Intrinsics.X86;
+using static Ryujinx.Audio.Renderer.Parameter.VoiceInParameter;
+
+namespace Ryujinx.Audio.Renderer.Dsp
+{
+    public static class ResamplerHelper
+    {
+        #region "Default Quality Lookup Tables"
+        private static short[] _normalCurveLut0 = new short[]
+        {
+            6600,  19426, 6722,  3,     6479,  19424, 6845,  9,     6359,  19419, 6968,  15,    6239,  19412, 7093,  22,
+            6121,  19403, 7219,  28,    6004,  19391, 7345,  34,    5888,  19377, 7472,  41,    5773,  19361, 7600,  48,
+            5659,  19342, 7728,  55,    5546,  19321, 7857,  62,    5434,  19298, 7987,  69,    5323,  19273, 8118,  77,
+            5213,  19245, 8249,  84,    5104,  19215, 8381,  92,    4997,  19183, 8513,  101,   4890,  19148, 8646,  109,
+            4785,  19112, 8780,  118,   4681,  19073, 8914,  127,   4579,  19031, 9048,  137,   4477,  18988, 9183,  147,
+            4377,  18942, 9318,  157,   4277,  18895, 9454,  168,   4179,  18845, 9590,  179,   4083,  18793, 9726,  190,
+            3987,  18738, 9863,  202,   3893,  18682, 10000, 215,   3800,  18624, 10137, 228,   3709,  18563, 10274, 241,
+            3618,  18500, 10411, 255,   3529,  18436, 10549, 270,   3441,  18369, 10687, 285,   3355,  18300, 10824, 300,
+            3269,  18230, 10962, 317,   3186,  18157, 11100, 334,   3103,  18082, 11238, 351,   3022,  18006, 11375, 369,
+            2942,  17927, 11513, 388,   2863,  17847, 11650, 408,   2785,  17765, 11788, 428,   2709,  17681, 11925, 449,
+            2635,  17595, 12062, 471,   2561,  17507, 12198, 494,   2489,  17418, 12334, 517,   2418,  17327, 12470, 541,
+            2348,  17234, 12606, 566,   2280,  17140, 12741, 592,   2213,  17044, 12876, 619,   2147,  16946, 13010, 647,
+            2083,  16846, 13144, 675,   2020,  16745, 13277, 704,   1958,  16643, 13409, 735,   1897,  16539, 13541, 766,
+            1838,  16434, 13673, 798,   1780,  16327, 13803, 832,   1723,  16218, 13933, 866,   1667,  16109, 14062, 901,
+            1613,  15998, 14191, 937,   1560,  15885, 14318, 975,   1508,  15772, 14445, 1013,  1457,  15657, 14571, 1052,
+            1407,  15540, 14695, 1093,  1359,  15423, 14819, 1134,  1312,  15304, 14942, 1177,  1266,  15185, 15064, 1221,
+            1221,  15064, 15185, 1266,  1177,  14942, 15304, 1312,  1134,  14819, 15423, 1359,  1093,  14695, 15540, 1407,
+            1052,  14571, 15657, 1457,  1013,  14445, 15772, 1508,  975,   14318, 15885, 1560,  937,   14191, 15998, 1613,
+            901,   14062, 16109, 1667,  866,   13933, 16218, 1723,  832,   13803, 16327, 1780,  798,   13673, 16434, 1838,
+            766,   13541, 16539, 1897,  735,   13409, 16643, 1958,  704,   13277, 16745, 2020,  675,   13144, 16846, 2083,
+            647,   13010, 16946, 2147,  619,   12876, 17044, 2213,  592,   12741, 17140, 2280,  566,   12606, 17234, 2348,
+            541,   12470, 17327, 2418,  517,   12334, 17418, 2489,  494,   12198, 17507, 2561,  471,   12062, 17595, 2635,
+            449,   11925, 17681, 2709,  428,   11788, 17765, 2785,  408,   11650, 17847, 2863,  388,   11513, 17927, 2942,
+            369,   11375, 18006, 3022,  351,   11238, 18082, 3103,  334,   11100, 18157, 3186,  317,   10962, 18230, 3269,
+            300,   10824, 18300, 3355,  285,   10687, 18369, 3441,  270,   10549, 18436, 3529,  255,   10411, 18500, 3618,
+            241,   10274, 18563, 3709,  228,   10137, 18624, 3800,  215,   10000, 18682, 3893,  202,   9863,  18738, 3987,
+            190,   9726,  18793, 4083,  179,   9590,  18845, 4179,  168,   9454,  18895, 4277,  157,   9318,  18942, 4377,
+            147,   9183,  18988, 4477,  137,   9048,  19031, 4579,  127,   8914,  19073, 4681,  118,   8780,  19112, 4785,
+            109,   8646,  19148, 4890,  101,   8513,  19183, 4997,  92,    8381,  19215, 5104,  84,    8249,  19245, 5213,
+            77,    8118,  19273, 5323,  69,    7987,  19298, 5434,  62,    7857,  19321, 5546,  55,    7728,  19342, 5659,
+            48,    7600,  19361, 5773,  41,    7472,  19377, 5888,  34,    7345,  19391, 6004,  28,    7219,  19403, 6121,
+            22,    7093,  19412, 6239,  15,    6968,  19419, 6359,  9,     6845,  19424, 6479,  3,     6722,  19426, 6600
+        };
+
+        private static short[] _normalCurveLut1 = new short[]
+        {
+            -68,   32639, 69,    -5,    -200,  32630, 212,   -15,   -328,  32613, 359,   -26,   -450,  32586, 512,   -36,
+            -568,  32551, 669,   -47,   -680,  32507, 832,   -58,   -788,  32454, 1000,  -69,   -891,  32393, 1174,  -80,
+            -990,  32323, 1352,  -92,   -1084, 32244, 1536,  -103,  -1173, 32157, 1724,  -115,  -1258, 32061, 1919,  -128,
+            -1338, 31956, 2118,  -140,  -1414, 31844, 2322,  -153,  -1486, 31723, 2532,  -167,  -1554, 31593, 2747,  -180,
+            -1617, 31456, 2967,  -194,  -1676, 31310, 3192,  -209,  -1732, 31157, 3422,  -224,  -1783, 30995, 3657,  -240,
+            -1830, 30826, 3897,  -256,  -1874, 30649, 4143,  -272,  -1914, 30464, 4393,  -289,  -1951, 30272, 4648,  -307,
+            -1984, 30072, 4908,  -325,  -2014, 29866, 5172,  -343,  -2040, 29652, 5442,  -362,  -2063, 29431, 5716,  -382,
+            -2083, 29203, 5994,  -403,  -2100, 28968, 6277,  -424,  -2114, 28727, 6565,  -445,  -2125, 28480, 6857,  -468,
+            -2133, 28226, 7153,  -490,  -2139, 27966, 7453,  -514,  -2142, 27700, 7758,  -538,  -2142, 27428, 8066,  -563,
+            -2141, 27151, 8378,  -588,  -2136, 26867, 8694,  -614,  -2130, 26579, 9013,  -641,  -2121, 26285, 9336,  -668,
+            -2111, 25987, 9663,  -696,  -2098, 25683, 9993,  -724,  -2084, 25375, 10326, -753,  -2067, 25063, 10662, -783,
+            -2049, 24746, 11000, -813,  -2030, 24425, 11342, -844,  -2009, 24100, 11686, -875,  -1986, 23771, 12033, -907,
+            -1962, 23438, 12382, -939,  -1937, 23103, 12733, -972,  -1911, 22764, 13086, -1005, -1883, 22422, 13441, -1039,
+            -1855, 22077, 13798, -1072, -1825, 21729, 14156, -1107, -1795, 21380, 14516, -1141, -1764, 21027, 14877, -1176,
+            -1732, 20673, 15239, -1211, -1700, 20317, 15602, -1246, -1667, 19959, 15965, -1282, -1633, 19600, 16329, -1317,
+            -1599, 19239, 16694, -1353, -1564, 18878, 17058, -1388, -1530, 18515, 17423, -1424, -1495, 18151, 17787, -1459,
+            -1459, 17787, 18151, -1495, -1424, 17423, 18515, -1530, -1388, 17058, 18878, -1564, -1353, 16694, 19239, -1599,
+            -1317, 16329, 19600, -1633, -1282, 15965, 19959, -1667, -1246, 15602, 20317, -1700, -1211, 15239, 20673, -1732,
+            -1176, 14877, 21027, -1764, -1141, 14516, 21380, -1795, -1107, 14156, 21729, -1825, -1072, 13798, 22077, -1855,
+            -1039, 13441, 22422, -1883, -1005, 13086, 22764, -1911, -972,  12733, 23103, -1937, -939,  12382, 23438, -1962,
+            -907,  12033, 23771, -1986, -875,  11686, 24100, -2009, -844,  11342, 24425, -2030, -813,  11000, 24746, -2049,
+            -783,  10662, 25063, -2067, -753,  10326, 25375, -2084, -724,  9993,  25683, -2098, -696,  9663,  25987, -2111,
+            -668,  9336,  26285, -2121, -641,  9013,  26579, -2130, -614,  8694,  26867, -2136, -588,  8378,  27151, -2141,
+            -563,  8066,  27428, -2142, -538,  7758,  27700, -2142, -514,  7453,  27966, -2139, -490,  7153,  28226, -2133,
+            -468,  6857,  28480, -2125, -445,  6565,  28727, -2114, -424,  6277,  28968, -2100, -403,  5994,  29203, -2083,
+            -382,  5716,  29431, -2063, -362,  5442,  29652, -2040, -343,  5172,  29866, -2014, -325,  4908,  30072, -1984,
+            -307,  4648,  30272, -1951, -289,  4393,  30464, -1914, -272,  4143,  30649, -1874, -256,  3897,  30826, -1830,
+            -240,  3657,  30995, -1783, -224,  3422,  31157, -1732, -209,  3192,  31310, -1676, -194,  2967,  31456, -1617,
+            -180,  2747,  31593, -1554, -167,  2532,  31723, -1486, -153,  2322,  31844, -1414, -140,  2118,  31956, -1338,
+            -128,  1919,  32061, -1258, -115,  1724,  32157, -1173, -103,  1536,  32244, -1084, -92,   1352,  32323, -990,
+            -80,   1174,  32393, -891,  -69,   1000,  32454, -788,  -58,   832,   32507, -680,  -47,   669,   32551, -568,
+            -36,   512,   32586, -450,  -26,   359,   32613, -328,  -15,   212,   32630, -200,  -5,    69,    32639, -68
+        };
+
+        private static short[] _normalCurveLut2 = new short[]
+        {
+            3195,  26287, 3329,  -32,   3064,  26281, 3467,  -34,   2936,  26270, 3608,  -38,   2811,  26253, 3751,  -42,
+            2688,  26230, 3897,  -46,   2568,  26202, 4046,  -50,   2451,  26169, 4199,  -54,   2338,  26130, 4354,  -58,
+            2227,  26085, 4512,  -63,   2120,  26035, 4673,  -67,   2015,  25980, 4837,  -72,   1912,  25919, 5004,  -76,
+            1813,  25852, 5174,  -81,   1716,  25780, 5347,  -87,   1622,  25704, 5522,  -92,   1531,  25621, 5701,  -98,
+            1442,  25533, 5882,  -103,  1357,  25440, 6066,  -109,  1274,  25342, 6253,  -115,  1193,  25239, 6442,  -121,
+            1115,  25131, 6635,  -127,  1040,  25018, 6830,  -133,  967,   24899, 7027,  -140,  897,   24776, 7227,  -146,
+            829,   24648, 7430,  -153,  764,   24516, 7635,  -159,  701,   24379, 7842,  -166,  641,   24237, 8052,  -174,
+            583,   24091, 8264,  -181,  526,   23940, 8478,  -187,  472,   23785, 8695,  -194,  420,   23626, 8914,  -202,
+            371,   23462, 9135,  -209,  324,   23295, 9358,  -215,  279,   23123, 9583,  -222,  236,   22948, 9809,  -230,
+            194,   22769, 10038, -237,  154,   22586, 10269, -243,  117,   22399, 10501, -250,  81,    22208, 10735, -258,
+            47,    22015, 10970, -265,  15,    21818, 11206, -271,  -16,   21618, 11444, -277,  -44,   21415, 11684, -283,
+            -71,   21208, 11924, -290,  -97,   20999, 12166, -296,  -121,  20786, 12409, -302,  -143,  20571, 12653, -306,
+            -163,  20354, 12898, -311,  -183,  20134, 13143, -316,  -201,  19911, 13389, -321,  -218,  19686, 13635, -325,
+            -234,  19459, 13882, -328,  -248,  19230, 14130, -332,  -261,  18998, 14377, -335,  -273,  18765, 14625, -337,
+            -284,  18531, 14873, -339,  -294,  18295, 15121, -341,  -302,  18057, 15369, -341,  -310,  17817, 15617, -341,
+            -317,  17577, 15864, -340,  -323,  17335, 16111, -340,  -328,  17092, 16357, -338,  -332,  16848, 16603, -336,
+            -336,  16603, 16848, -332,  -338,  16357, 17092, -328,  -340,  16111, 17335, -323,  -340,  15864, 17577, -317,
+            -341,  15617, 17817, -310,  -341,  15369, 18057, -302,  -341,  15121, 18295, -294,  -339,  14873, 18531, -284,
+            -337,  14625, 18765, -273,  -335,  14377, 18998, -261,  -332,  14130, 19230, -248,  -328,  13882, 19459, -234,
+            -325,  13635, 19686, -218,  -321,  13389, 19911, -201,  -316,  13143, 20134, -183,  -311,  12898, 20354, -163,
+            -306,  12653, 20571, -143,  -302,  12409, 20786, -121,  -296,  12166, 20999, -97,   -290,  11924, 21208, -71,
+            -283,  11684, 21415, -44,   -277,  11444, 21618, -16,   -271,  11206, 21818, 15,    -265,  10970, 22015, 47,
+            -258,  10735, 22208, 81,    -250,  10501, 22399, 117,   -243,  10269, 22586, 154,   -237,  10038, 22769, 194,
+            -230,  9809,  22948, 236,   -222,  9583,  23123, 279,   -215,  9358,  23295, 324,   -209,  9135,  23462, 371,
+            -202,  8914,  23626, 420,   -194,  8695,  23785, 472,   -187,  8478,  23940, 526,   -181,  8264,  24091, 583,
+            -174,  8052,  24237, 641,   -166,  7842,  24379, 701,   -159,  7635,  24516, 764,   -153,  7430,  24648, 829,
+            -146,  7227,  24776, 897,   -140,  7027,  24899, 967,   -133,  6830,  25018, 1040,  -127,  6635,  25131, 1115,
+            -121,  6442,  25239, 1193,  -115,  6253,  25342, 1274,  -109,  6066,  25440, 1357,  -103,  5882,  25533, 1442,
+            -98,   5701,  25621, 1531,  -92,   5522,  25704, 1622,  -87,   5347,  25780, 1716,  -81,   5174,  25852, 1813,
+            -76,   5004,  25919, 1912,  -72,   4837,  25980, 2015,  -67,   4673,  26035, 2120,  -63,   4512,  26085, 2227,
+            -58,   4354,  26130, 2338,  -54,   4199,  26169, 2451,  -50,   4046,  26202, 2568,  -46,   3897,  26230, 2688,
+            -42,   3751,  26253, 2811,  -38,   3608,  26270, 2936,  -34,   3467,  26281, 3064,  -32,   3329,  26287, 3195
+        };
+        #endregion
+
+        #region "High Quality Lookup Tables"
+        private static short[] _highCurveLut0 = new short[]
+        {
+            -582, -23,  8740, 16386, 8833,  8,    -590,  0,    -573, -54,  8647, 16385, 8925,  40,   -598, -1,
+            -565, -84,  8555, 16383, 9018,  72,   -606,  -1,   -557, -113, 8462, 16379, 9110,  105,  -614, -2,
+            -549, -142, 8370, 16375, 9203,  139,  -622,  -2,   -541, -170, 8277, 16369, 9295,  173,  -630, -3,
+            -533, -198, 8185, 16362, 9387,  208,  -638,  -4,   -525, -225, 8093, 16354, 9480,  244,  -646, -5,
+            -516, -251, 8000, 16344, 9572,  280,  -654,  -5,   -508, -277, 7908, 16334, 9664,  317,  -662, -6,
+            -500, -302, 7816, 16322, 9756,  355,  -670,  -7,   -492, -327, 7724, 16310, 9847,  393,  -678, -8,
+            -484, -351, 7632, 16296, 9939,  432,  -686,  -9,   -476, -374, 7540, 16281, 10030, 471,  -694, -10,
+            -468, -397, 7449, 16265, 10121, 511,  -702,  -11,  -460, -419, 7357, 16247, 10212, 552,  -709, -13,
+            -452, -441, 7266, 16229, 10303, 593,  -717,  -14,  -445, -462, 7175, 16209, 10394, 635,  -724, -15,
+            -437, -483, 7084, 16189, 10484, 678,  -732,  -16,  -429, -503, 6994, 16167, 10574, 722,  -739, -18,
+            -421, -523, 6903, 16144, 10664, 766,  -747,  -19,  -414, -542, 6813, 16120, 10754, 810,  -754, -21,
+            -406, -560, 6723, 16095, 10843, 856,  -761,  -22,  -398, -578, 6633, 16068, 10932, 902,  -768, -24,
+            -391, -596, 6544, 16041, 11021, 949,  -775,  -26,  -383, -612, 6454, 16012, 11109, 996,  -782, -27,
+            -376, -629, 6366, 15983, 11197, 1044, -789,  -29,  -368, -645, 6277, 15952, 11285, 1093, -796, -31,
+            -361, -660, 6189, 15920, 11372, 1142, -802,  -33,  -354, -675, 6100, 15887, 11459, 1192, -809, -35,
+            -347, -689, 6013, 15853, 11546, 1243, -815,  -37,  -339, -703, 5925, 15818, 11632, 1294, -821, -39,
+            -332, -717, 5838, 15782, 11718, 1346, -827,  -41,  -325, -730, 5751, 15745, 11803, 1399, -833, -43,
+            -318, -742, 5665, 15707, 11888, 1452, -839,  -46,  -312, -754, 5579, 15668, 11973, 1506, -845, -48,
+            -305, -766, 5493, 15627, 12057, 1561, -850,  -50,  -298, -777, 5408, 15586, 12140, 1616, -855, -53,
+            -291, -787, 5323, 15544, 12224, 1672, -861,  -56,  -285, -798, 5239, 15500, 12306, 1729, -866, -58,
+            -278, -807, 5155, 15456, 12388, 1786, -871,  -61,  -272, -817, 5071, 15410, 12470, 1844, -875, -64,
+            -265, -826, 4988, 15364, 12551, 1902, -880,  -67,  -259, -834, 4905, 15317, 12631, 1962, -884, -70,
+            -253, -842, 4823, 15268, 12711, 2022, -888,  -73,  -247, -850, 4741, 15219, 12790, 2082, -892, -76,
+            -241, -857, 4659, 15168, 12869, 2143, -896,  -79,  -235, -864, 4578, 15117, 12947, 2205, -899, -82,
+            -229, -870, 4498, 15065, 13025, 2267, -903,  -85,  -223, -876, 4417, 15012, 13102, 2331, -906, -89,
+            -217, -882, 4338, 14958, 13178, 2394, -909,  -92,  -211, -887, 4259, 14903, 13254, 2459, -911, -96,
+            -206, -892, 4180, 14847, 13329, 2523, -914,  -100, -200, -896, 4102, 14790, 13403, 2589, -916, -103,
+            -195, -900, 4024, 14732, 13477, 2655, -918,  -107, -190, -904, 3947, 14673, 13550, 2722, -919, -111,
+            -184, -908, 3871, 14614, 13622, 2789, -921,  -115, -179, -911, 3795, 14553, 13693, 2857, -922, -119,
+            -174, -913, 3719, 14492, 13764, 2926, -923,  -123, -169, -916, 3644, 14430, 13834, 2995, -923, -127,
+            -164, -918, 3570, 14367, 13904, 3065, -924,  -132, -159, -920, 3496, 14303, 13972, 3136, -924, -136,
+            -154, -921, 3423, 14239, 14040, 3207, -924,  -140, -150, -922, 3350, 14173, 14107, 3278, -923, -145,
+            -145, -923, 3278, 14107, 14173, 3350, -922,  -150, -140, -924, 3207, 14040, 14239, 3423, -921, -154,
+            -136, -924, 3136, 13972, 14303, 3496, -920,  -159, -132, -924, 3065, 13904, 14367, 3570, -918, -164,
+            -127, -923, 2995, 13834, 14430, 3644, -916,  -169, -123, -923, 2926, 13764, 14492, 3719, -913, -174,
+            -119, -922, 2857, 13693, 14553, 3795, -911,  -179, -115, -921, 2789, 13622, 14614, 3871, -908, -184,
+            -111, -919, 2722, 13550, 14673, 3947, -904,  -190, -107, -918, 2655, 13477, 14732, 4024, -900, -195,
+            -103, -916, 2589, 13403, 14790, 4102, -896,  -200, -100, -914, 2523, 13329, 14847, 4180, -892, -206,
+            -96,  -911, 2459, 13254, 14903, 4259, -887,  -211, -92,  -909, 2394, 13178, 14958, 4338, -882, -217,
+            -89,  -906, 2331, 13102, 15012, 4417, -876,  -223, -85,  -903, 2267, 13025, 15065, 4498, -870, -229,
+            -82,  -899, 2205, 12947, 15117, 4578, -864,  -235, -79,  -896, 2143, 12869, 15168, 4659, -857, -241,
+            -76,  -892, 2082, 12790, 15219, 4741, -850,  -247, -73,  -888, 2022, 12711, 15268, 4823, -842, -253,
+            -70,  -884, 1962, 12631, 15317, 4905, -834,  -259, -67,  -880, 1902, 12551, 15364, 4988, -826, -265,
+            -64,  -875, 1844, 12470, 15410, 5071, -817,  -272, -61,  -871, 1786, 12388, 15456, 5155, -807, -278,
+            -58,  -866, 1729, 12306, 15500, 5239, -798,  -285, -56,  -861, 1672, 12224, 15544, 5323, -787, -291,
+            -53,  -855, 1616, 12140, 15586, 5408, -777,  -298, -50,  -850, 1561, 12057, 15627, 5493, -766, -305,
+            -48,  -845, 1506, 11973, 15668, 5579, -754,  -312, -46,  -839, 1452, 11888, 15707, 5665, -742, -318,
+            -43,  -833, 1399, 11803, 15745, 5751, -730,  -325, -41,  -827, 1346, 11718, 15782, 5838, -717, -332,
+            -39,  -821, 1294, 11632, 15818, 5925, -703,  -339, -37,  -815, 1243, 11546, 15853, 6013, -689, -347,
+            -35,  -809, 1192, 11459, 15887, 6100, -675,  -354, -33,  -802, 1142, 11372, 15920, 6189, -660, -361,
+            -31,  -796, 1093, 11285, 15952, 6277, -645,  -368, -29,  -789, 1044, 11197, 15983, 6366, -629, -376,
+            -27,  -782, 996,  11109, 16012, 6454, -612,  -383, -26,  -775, 949,  11021, 16041, 6544, -596, -391,
+            -24,  -768, 902,  10932, 16068, 6633, -578,  -398, -22,  -761, 856,  10843, 16095, 6723, -560, -406,
+            -21,  -754, 810,  10754, 16120, 6813, -542,  -414, -19,  -747, 766,  10664, 16144, 6903, -523, -421,
+            -18,  -739, 722,  10574, 16167, 6994, -503,  -429, -16,  -732, 678,  10484, 16189, 7084, -483, -437,
+            -15,  -724, 635,  10394, 16209, 7175, -462,  -445, -14,  -717, 593,  10303, 16229, 7266, -441, -452,
+            -13,  -709, 552,  10212, 16247, 7357, -419,  -460, -11,  -702, 511,  10121, 16265, 7449, -397, -468,
+            -10,  -694, 471,  10030, 16281, 7540, -374,  -476, -9,   -686, 432,  9939,  16296, 7632, -351, -484,
+            -8,   -678, 393,  9847,  16310, 7724, -327,  -492, -7,   -670, 355,  9756,  16322, 7816, -302, -500,
+            -6,   -662, 317,  9664,  16334, 7908, -277,  -508, -5,   -654, 280,  9572,  16344, 8000, -251, -516,
+            -5,   -646, 244,  9480,  16354, 8093, -225,  -525, -4,   -638, 208,  9387,  16362, 8185, -198, -533,
+            -3,   -630, 173,  9295,  16369, 8277, -170,  -541, -2,   -622, 139,  9203,  16375, 8370, -142, -549,
+            -2,   -614, 105,  9110,  16379, 8462, -113,  -557, -1,   -606, 72,   9018,  16383, 8555, -84,  -565,
+            -1,   -598, 40,   8925,  16385, 8647, -54,   -573, 0,    -590, 8,    8833,  16386, 8740, -23,  -582,
+        };
+
+        private static short[] _highCurveLut1 = new short[]
+        {
+            -12,  47,   -134,  32767, 81,     -16,   2,     0,    -26,  108,  -345,   32760, 301,   -79,   17,   -1,
+            -40,  168,  -552,  32745, 526,    -144,  32,    -2,   -53,  226,  -753,   32723, 755,   -210,  47,   -3,
+            -66,  284,  -950,  32694, 989,    -277,  63,    -5,   -78,  340,  -1143,  32658, 1226,  -346,  79,   -6,
+            -90,  394,  -1331, 32615, 1469,   -415,  96,    -8,   -101, 447,  -1514,  32564, 1715,  -486,  113,  -9,
+            -112, 499,  -1692, 32506, 1966,   -557,  130,   -11,  -123, 550,  -1865,  32441, 2221,  -630,  148,  -13,
+            -133, 599,  -2034, 32369, 2480,   -703,  166,   -14,  -143, 646,  -2198,  32290, 2743,  -778,  185,  -16,
+            -152, 693,  -2357, 32204, 3010,   -853,  204,   -18,  -162, 738,  -2512,  32110, 3281,  -929,  223,  -20,
+            -170, 781,  -2662, 32010, 3555,   -1007, 242,   -23,  -178, 823,  -2807,  31903, 3834,  -1084, 262,  -25,
+            -186, 864,  -2947, 31789, 4116,   -1163, 282,   -27,  -194, 903,  -3082,  31668, 4403,  -1242, 303,  -30,
+            -201, 940,  -3213, 31540, 4692,   -1322, 323,   -32,  -207, 977,  -3339,  31406, 4985,  -1403, 344,  -35,
+            -214, 1011, -3460, 31265, 5282,   -1484, 365,   -37,  -220, 1045, -3577,  31117, 5582,  -1566, 387,  -40,
+            -225, 1077, -3688, 30963, 5885,   -1648, 409,   -43,  -230, 1107, -3796,  30802, 6191,  -1730, 431,  -46,
+            -235, 1136, -3898, 30635, 6501,   -1813, 453,   -49,  -240, 1164, -3996,  30462, 6813,  -1896, 475,  -52,
+            -244, 1190, -4089, 30282, 7128,   -1980, 498,   -55,  -247, 1215, -4178,  30097, 7446,  -2064, 520,  -58,
+            -251, 1239, -4262, 29905, 7767,   -2148, 543,   -62,  -254, 1261, -4342,  29707, 8091,  -2231, 566,  -65,
+            -257, 1281, -4417, 29503, 8416,   -2315, 589,   -69,  -259, 1301, -4488,  29293, 8745,  -2399, 613,  -72,
+            -261, 1319, -4555, 29078, 9075,   -2483, 636,   -76,  -263, 1336, -4617,  28857, 9408,  -2567, 659,  -80,
+            -265, 1351, -4674, 28631, 9743,   -2651, 683,   -83,  -266, 1365, -4728,  28399, 10080, -2734, 706,  -87,
+            -267, 1378, -4777, 28161, 10418,  -2817, 730,   -91,  -267, 1389, -4822,  27919, 10759, -2899, 753,  -95,
+            -268, 1400, -4863, 27671, 11100,  -2981, 777,   -99,  -268, 1409, -4900,  27418, 11444, -3063, 800,  -103,
+            -268, 1416, -4933, 27161, 11789,  -3144, 824,   -107, -267, 1423, -4962,  26898, 12135, -3224, 847,  -112,
+            -267, 1428, -4987, 26631, 12482,  -3303, 870,   -116, -266, 1433, -5008,  26359, 12830, -3382, 893,  -120,
+            -265, 1436, -5026, 26083, 13179,  -3460, 916,   -125, -264, 1438, -5039,  25802, 13529, -3537, 939,  -129,
+            -262, 1438, -5049, 25517, 13880,  -3613, 962,   -133, -260, 1438, -5055,  25228, 14231, -3687, 984,  -138,
+            -258, 1437, -5058, 24935, 14582,  -3761, 1006,  -142, -256, 1435, -5058,  24639, 14934, -3833, 1028, -147,
+            -254, 1431, -5053, 24338, 15286,  -3904, 1049,  -151, -252, 1427, -5046,  24034, 15638, -3974, 1071, -155,
+            -249, 1422, -5035, 23726, 15989,  -4042, 1091,  -160, -246, 1416, -5021,  23415, 16341, -4109, 1112, -164,
+            -243, 1408, -5004, 23101, 16691,  -4174, 1132,  -169, -240, 1400, -4984,  22783, 17042, -4237, 1152, -173,
+            -237, 1392, -4960, 22463, 17392,  -4299, 1171,  -178, -234, 1382, -4934,  22140, 17740, -4358, 1190, -182,
+            -230, 1371, -4905, 21814, 18088,  -4416, 1209,  -186, -227, 1360, -4873,  21485, 18435, -4472, 1226, -191,
+            -223, 1348, -4839, 21154, 18781,  -4526, 1244,  -195, -219, 1335, -4801,  20821, 19125, -4578, 1260, -199,
+            -215, 1321, -4761, 20486, 19468,  -4627, 1277,  -203, -211, 1307, -4719,  20148, 19809, -4674, 1292, -207,
+            -207, 1292, -4674, 19809, 20148,  -4719, 1307,  -211, -203, 1277, -4627,  19468, 20486, -4761, 1321, -215,
+            -199, 1260, -4578, 19125, 20821,  -4801, 1335,  -219, -195, 1244, -4526,  18781, 21154, -4839, 1348, -223,
+            -191, 1226, -4472, 18435, 21485,  -4873, 1360,  -227, -186, 1209, -4416,  18088, 21814, -4905, 1371, -230,
+            -182, 1190, -4358, 17740, 22140,  -4934, 1382,  -234, -178, 1171, -4299,  17392, 22463, -4960, 1392, -237,
+            -173, 1152, -4237, 17042, 22783,  -4984, 1400,  -240, -169, 1132, -4174,  16691, 23101, -5004, 1408, -243,
+            -164, 1112, -4109, 16341, 23415,  -5021, 1416,  -246, -160, 1091, -4042,  15989, 23726, -5035, 1422, -249,
+            -155, 1071, -3974, 15638, 24034,  -5046, 1427,  -252, -151, 1049, -3904,  15286, 24338, -5053, 1431, -254,
+            -147, 1028, -3833, 14934, 24639,  -5058, 1435,  -256, -142, 1006, -3761,  14582, 24935, -5058, 1437, -258,
+            -138, 984,  -3687, 14231, 25228,  -5055, 1438,  -260, -133, 962,  -3613,  13880, 25517, -5049, 1438, -262,
+            -129, 939,  -3537, 13529, 25802,  -5039, 1438,  -264, -125, 916,  -3460,  13179, 26083, -5026, 1436, -265,
+            -120, 893,  -3382, 12830, 26359,  -5008, 1433,  -266, -116, 870,  -3303,  12482, 26631, -4987, 1428, -267,
+            -112, 847,  -3224, 12135, 26898,  -4962, 1423,  -267, -107, 824,  -3144,  11789, 27161, -4933, 1416, -268,
+            -103, 800,  -3063, 11444, 27418,  -4900, 1409,  -268, -99,  777,  -2981,  11100, 27671, -4863, 1400, -268,
+            -95,  753,  -2899, 10759, 27919,  -4822, 1389,  -267, -91,  730,  -2817,  10418, 28161, -4777, 1378, -267,
+            -87,  706,  -2734, 10080, 28399,  -4728, 1365,  -266, -83,  683,  -2651,  9743,  28631, -4674, 1351, -265,
+            -80,  659,  -2567, 9408,  28857,  -4617, 1336,  -263, -76,  636,  -2483,  9075,  29078, -4555, 1319, -261,
+            -72,  613,  -2399, 8745,  29293,  -4488, 1301,  -259, -69,  589,  -2315,  8416,  29503, -4417, 1281, -257,
+            -65,  566,  -2231, 8091,  29707,  -4342, 1261,  -254, -62,  543,  -2148,  7767,  29905, -4262, 1239, -251,
+            -58,  520,  -2064, 7446,  30097,  -4178, 1215,  -247, -55,  498,  -1980,  7128,  30282, -4089, 1190, -244,
+            -52,  475,  -1896, 6813,  30462,  -3996, 1164,  -240, -49,  453,  -1813,  6501,  30635, -3898, 1136, -235,
+            -46,  431,  -1730, 6191,  30802,  -3796, 1107,  -230, -43,  409,  -1648,  5885,  30963, -3688, 1077, -225,
+            -40,  387,  -1566, 5582,  31117,  -3577, 1045,  -220, -37,  365,  -1484,  5282,  31265, -3460, 1011, -214,
+            -35,  344,  -1403, 4985,  31406,  -3339, 977,   -207, -32,  323,  -1322,  4692,  31540, -3213, 940,  -201,
+            -30,  303,  -1242, 4403,  31668,  -3082, 903,   -194, -27,  282,  -1163,  4116,  31789, -2947, 864,  -186,
+            -25,  262,  -1084, 3834,  31903,  -2807, 823,   -178, -23,  242,  -1007,  3555,  32010, -2662, 781,  -170,
+            -20,  223,  -929,  3281,  32110,  -2512, 738,   -162, -18,  204,  -853,   3010,  32204, -2357, 693,  -152,
+            -16,  185,  -778,  2743,  32290,  -2198, 646,   -143, -14,  166,  -703,   2480,  32369, -2034, 599,  -133,
+            -13,  148,  -630,  2221,  32441,  -1865, 550,   -123, -11,  130,  -557,   1966,  32506, -1692, 499,  -112,
+            -9,   113,  -486,  1715,  32564,  -1514, 447,   -101, -8,   96,   -415,   1469,  32615, -1331, 394,  -90,
+            -6,   79,   -346,  1226,  32658,  -1143, 340,   -78,  -5,   63,   -277,   989,   32694, -950,  284,  -66,
+            -3,   47,   -210,  755,   32723,  -753,  226,   -53,  -2,   32,   -144,   526,   32745, -552,  168,  -40,
+            -1,   17,   -79,   301,   32760,  -345,  108,   -26,  0,    2,    -16,    81,    32767, -134,  47,   -12,
+        };
+
+        private static short[] _highCurveLut2 = new short[]
+        {
+            418, -2538, 6118,  24615, 6298,  -2563, 417,   0,   420, -2512, 5939,  24611, 6479,  -2588, 415,   1,
+            421, -2485, 5761,  24605, 6662,  -2612, 412,   2,   422, -2458, 5585,  24595, 6846,  -2635, 409,   3,
+            423, -2430, 5410,  24582, 7030,  -2658, 406,   4,   423, -2402, 5236,  24565, 7216,  -2680, 403,   5,
+            423, -2373, 5064,  24546, 7403,  -2701, 399,   6,   423, -2343, 4893,  24523, 7591,  -2721, 395,   7,
+            423, -2313, 4724,  24496, 7780,  -2741, 391,   8,   422, -2283, 4556,  24467, 7970,  -2759, 386,   9,
+            421, -2252, 4390,  24434, 8161,  -2777, 381,   11,  420, -2221, 4225,  24398, 8353,  -2794, 376,   12,
+            419, -2190, 4062,  24359, 8545,  -2810, 370,   14,  418, -2158, 3900,  24316, 8739,  -2825, 364,   15,
+            416, -2126, 3740,  24271, 8933,  -2839, 358,   17,  414, -2093, 3582,  24222, 9127,  -2851, 351,   19,
+            412, -2060, 3425,  24170, 9323,  -2863, 344,   21,  410, -2027, 3270,  24115, 9519,  -2874, 336,   22,
+            407, -1993, 3117,  24056, 9715,  -2884, 328,   24,  404, -1960, 2966,  23995, 9912,  -2893, 319,   26,
+            402, -1926, 2816,  23930, 10110, -2900, 311,   29,  398, -1892, 2668,  23863, 10308, -2907, 301,   31,
+            395, -1858, 2522,  23792, 10506, -2912, 292,   33,  392, -1823, 2378,  23718, 10705, -2916, 282,   35,
+            389, -1789, 2235,  23641, 10904, -2919, 271,   38,  385, -1754, 2095,  23561, 11103, -2920, 261,   40,
+            381, -1719, 1956,  23478, 11303, -2921, 249,   43,  377, -1684, 1819,  23393, 11502, -2920, 238,   45,
+            373, -1649, 1684,  23304, 11702, -2917, 225,   48,  369, -1615, 1551,  23212, 11902, -2914, 213,   51,
+            365, -1580, 1420,  23118, 12102, -2909, 200,   54,  361, -1545, 1291,  23020, 12302, -2902, 186,   57,
+            356, -1510, 1163,  22920, 12502, -2895, 173,   60,  352, -1475, 1038,  22817, 12702, -2885, 158,   63,
+            347, -1440, 915,   22711, 12901, -2875, 143,   66,  342, -1405, 793,   22602, 13101, -2863, 128,   69,
+            338, -1370, 674,   22491, 13300, -2849, 113,   73,  333, -1335, 557,   22377, 13499, -2834, 97,    76,
+            328, -1301, 441,   22260, 13698, -2817, 80,    80,  323, -1266, 328,   22141, 13896, -2799, 63,    83,
+            318, -1232, 217,   22019, 14094, -2779, 46,    87,  313, -1197, 107,   21894, 14291, -2758, 28,    91,
+            307, -1163, 0,     21767, 14488, -2735, 9,     95,  302, -1129, -105,  21637, 14684, -2710, -9,    98,
+            297, -1096, -208,  21506, 14879, -2684, -29,   102, 292, -1062, -310,  21371, 15074, -2656, -48,   106,
+            286, -1029, -409,  21234, 15268, -2626, -69,   111, 281, -996,  -506,  21095, 15461, -2595, -89,   115,
+            276, -963,  -601,  20954, 15654, -2562, -110,  119, 270, -930,  -694,  20810, 15846, -2527, -132,  123,
+            265, -898,  -785,  20664, 16036, -2490, -154,  128, 260, -866,  -874,  20516, 16226, -2452, -176,  132,
+            254, -834,  -961,  20366, 16415, -2411, -199,  137, 249, -803,  -1046, 20213, 16602, -2369, -222,  141,
+            243, -771,  -1129, 20059, 16789, -2326, -246,  146, 238, -740,  -1209, 19902, 16974, -2280, -270,  151,
+            233, -710,  -1288, 19744, 17158, -2232, -294,  156, 227, -680,  -1365, 19583, 17341, -2183, -319,  160,
+            222, -650,  -1440, 19421, 17523, -2132, -345,  165, 217, -620,  -1513, 19257, 17703, -2079, -370,  170,
+            211, -591,  -1583, 19091, 17882, -2023, -396,  175, 206, -562,  -1652, 18923, 18059, -1966, -423,  180,
+            201, -533,  -1719, 18754, 18235, -1907, -450,  185, 196, -505,  -1784, 18582, 18410, -1847, -477,  191,
+            191, -477,  -1847, 18410, 18582, -1784, -505,  196, 185, -450,  -1907, 18235, 18754, -1719, -533,  201,
+            180, -423,  -1966, 18059, 18923, -1652, -562,  206, 175, -396,  -2023, 17882, 19091, -1583, -591,  211,
+            170, -370,  -2079, 17703, 19257, -1513, -620,  217, 165, -345,  -2132, 17523, 19421, -1440, -650,  222,
+            160, -319,  -2183, 17341, 19583, -1365, -680,  227, 156, -294,  -2232, 17158, 19744, -1288, -710,  233,
+            151, -270,  -2280, 16974, 19902, -1209, -740,  238, 146, -246,  -2326, 16789, 20059, -1129, -771,  243,
+            141, -222,  -2369, 16602, 20213, -1046, -803,  249, 137, -199,  -2411, 16415, 20366, -961,  -834,  254,
+            132, -176,  -2452, 16226, 20516, -874,  -866,  260, 128, -154,  -2490, 16036, 20664, -785,  -898,  265,
+            123, -132,  -2527, 15846, 20810, -694,  -930,  270, 119, -110,  -2562, 15654, 20954, -601,  -963,  276,
+            115, -89,   -2595, 15461, 21095, -506,  -996,  281, 111, -69,   -2626, 15268, 21234, -409,  -1029, 286,
+            106, -48,   -2656, 15074, 21371, -310,  -1062, 292, 102, -29,   -2684, 14879, 21506, -208,  -1096, 297,
+            98,  -9,    -2710, 14684, 21637, -105,  -1129, 302, 95,  9,     -2735, 14488, 21767, 0,     -1163, 307,
+            91,  28,    -2758, 14291, 21894, 107,   -1197, 313, 87,  46,    -2779, 14094, 22019, 217,   -1232, 318,
+            83,  63,    -2799, 13896, 22141, 328,   -1266, 323, 80,  80,    -2817, 13698, 22260, 441,   -1301, 328,
+            76,  97,    -2834, 13499, 22377, 557,   -1335, 333, 73,  113,   -2849, 13300, 22491, 674,   -1370, 338,
+            69,  128,   -2863, 13101, 22602, 793,   -1405, 342, 66,  143,   -2875, 12901, 22711, 915,   -1440, 347,
+            63,  158,   -2885, 12702, 22817, 1038,  -1475, 352, 60,  173,   -2895, 12502, 22920, 1163,  -1510, 356,
+            57,  186,   -2902, 12302, 23020, 1291,  -1545, 361, 54,  200,   -2909, 12102, 23118, 1420,  -1580, 365,
+            51,  213,   -2914, 11902, 23212, 1551,  -1615, 369, 48,  225,   -2917, 11702, 23304, 1684,  -1649, 373,
+            45,  238,   -2920, 11502, 23393, 1819,  -1684, 377, 43,  249,   -2921, 11303, 23478, 1956,  -1719, 381,
+            40,  261,   -2920, 11103, 23561, 2095,  -1754, 385, 38,  271,   -2919, 10904, 23641, 2235,  -1789, 389,
+            35,  282,   -2916, 10705, 23718, 2378,  -1823, 392, 33,  292,   -2912, 10506, 23792, 2522,  -1858, 395,
+            31,  301,   -2907, 10308, 23863, 2668,  -1892, 398, 29,  311,   -2900, 10110, 23930, 2816,  -1926, 402,
+            26,  319,   -2893, 9912,  23995, 2966,  -1960, 404, 24,  328,   -2884, 9715,  24056, 3117,  -1993, 407,
+            22,  336,   -2874, 9519,  24115, 3270,  -2027, 410, 21,  344,   -2863, 9323,  24170, 3425,  -2060, 412,
+            19,  351,   -2851, 9127,  24222, 3582,  -2093, 414, 17,  358,   -2839, 8933,  24271, 3740,  -2126, 416,
+            15,  364,   -2825, 8739,  24316, 3900,  -2158, 418, 14,  370,   -2810, 8545,  24359, 4062,  -2190, 419,
+            12,  376,   -2794, 8353,  24398, 4225,  -2221, 420, 11,  381,   -2777, 8161,  24434, 4390,  -2252, 421,
+            9,   386,   -2759, 7970,  24467, 4556,  -2283, 422, 8,   391,   -2741, 7780,  24496, 4724,  -2313, 423,
+            7,   395,   -2721, 7591,  24523, 4893,  -2343, 423, 6,   399,   -2701, 7403,  24546, 5064,  -2373, 423,
+            5,   403,   -2680, 7216,  24565, 5236,  -2402, 423, 4,   406,   -2658, 7030,  24582, 5410,  -2430, 423,
+            3,   409,   -2635, 6846,  24595, 5585,  -2458, 422, 2,   412,   -2612, 6662,  24605, 5761,  -2485, 421,
+            1,   415,   -2588, 6479,  24611, 5939,  -2512, 420, 0,   417,   -2563, 6298,  24615, 6118,  -2538, 418,
+        };
+        #endregion
+
+        private static float[] _normalCurveLut0F;
+        private static float[] _normalCurveLut1F;
+        private static float[] _normalCurveLut2F;
+
+        private static float[] _highCurveLut0F;
+        private static float[] _highCurveLut1F;
+        private static float[] _highCurveLut2F;
+
+        static ResamplerHelper()
+        {
+            _normalCurveLut0F = _normalCurveLut0.Select(x => x / 32768f).ToArray();
+            _normalCurveLut1F = _normalCurveLut1.Select(x => x / 32768f).ToArray();
+            _normalCurveLut2F = _normalCurveLut2.Select(x => x / 32768f).ToArray();
+
+            _highCurveLut0F = _highCurveLut0.Select(x => x / 32768f).ToArray();
+            _highCurveLut1F = _highCurveLut1.Select(x => x / 32768f).ToArray();
+            _highCurveLut2F = _highCurveLut2.Select(x => x / 32768f).ToArray();
+        }
+
+        private const int FixedPointPrecision = 15;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void Resample(Span<float> outputBuffer, ReadOnlySpan<short> inputBuffer, float ratio, ref float fraction, int sampleCount, SampleRateConversionQuality srcQuality, bool needPitch)
+        {
+            switch (srcQuality)
+            {
+                case SampleRateConversionQuality.Default:
+                    ResampleDefaultQuality(outputBuffer, inputBuffer, ratio, ref fraction, sampleCount, needPitch);
+                    break;
+                case SampleRateConversionQuality.Low:
+                    ResampleLowQuality(outputBuffer, inputBuffer, ratio, ref fraction, sampleCount);
+                    break;
+                case SampleRateConversionQuality.High:
+                    ResampleHighQuality(outputBuffer, inputBuffer, ratio, ref fraction, sampleCount);
+                    break;
+                default:
+                    throw new NotImplementedException($"{srcQuality}");
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static ReadOnlySpan<float> GetDefaultParameter(float ratio)
+        {
+            if (ratio <= 1.0f)
+            {
+                return _normalCurveLut1F;
+            }
+            else if (ratio > 1.333313f)
+            {
+                return _normalCurveLut0F;
+            }
+
+            return _normalCurveLut2F;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private unsafe static void ResampleDefaultQuality(Span<float> outputBuffer, ReadOnlySpan<short> inputBuffer, float ratio, ref float fraction, int sampleCount, bool needPitch)
+        {
+            ReadOnlySpan<float> parameters = GetDefaultParameter(ratio);
+
+            int inputBufferIndex = 0, i = 0;
+
+            // TODO: REV8 fast path (when needPitch == false the input index progression is constant + we need SIMD)
+
+            if (Sse41.IsSupported)
+            {
+                if (ratio == 1f)
+                {
+                    fixed (short* pInput = inputBuffer)
+                    {
+                        fixed (float* pOutput = outputBuffer, pParameters = parameters)
+                        {
+                            Vector128<float> parameter = Sse.LoadVector128(pParameters);
+
+                            for (; i < (sampleCount & ~3); i += 4)
+                            {
+                                Vector128<int> intInput0 = Sse41.ConvertToVector128Int32(pInput + (uint)i);
+                                Vector128<int> intInput1 = Sse41.ConvertToVector128Int32(pInput + (uint)i + 1);
+                                Vector128<int> intInput2 = Sse41.ConvertToVector128Int32(pInput + (uint)i + 2);
+                                Vector128<int> intInput3 = Sse41.ConvertToVector128Int32(pInput + (uint)i + 3);
+
+                                Vector128<float> input0 = Sse2.ConvertToVector128Single(intInput0);
+                                Vector128<float> input1 = Sse2.ConvertToVector128Single(intInput1);
+                                Vector128<float> input2 = Sse2.ConvertToVector128Single(intInput2);
+                                Vector128<float> input3 = Sse2.ConvertToVector128Single(intInput3);
+
+                                Vector128<float> mix0 = Sse.Multiply(input0, parameter);
+                                Vector128<float> mix1 = Sse.Multiply(input1, parameter);
+                                Vector128<float> mix2 = Sse.Multiply(input2, parameter);
+                                Vector128<float> mix3 = Sse.Multiply(input3, parameter);
+
+                                Vector128<float> mix01 = Sse3.HorizontalAdd(mix0, mix1);
+                                Vector128<float> mix23 = Sse3.HorizontalAdd(mix2, mix3);
+
+                                Vector128<float> mix0123 = Sse3.HorizontalAdd(mix01, mix23);
+
+                                Sse.Store(pOutput + (uint)i, Sse41.RoundToNearestInteger(mix0123));
+                            }
+                        }
+                    }
+
+                    inputBufferIndex = i;
+                }
+                else
+                {
+                    fixed (short* pInput = inputBuffer)
+                    {
+                        fixed (float* pOutput = outputBuffer, pParameters = parameters)
+                        {
+                            for (; i < (sampleCount & ~3); i += 4)
+                            {
+                                uint baseIndex0 = (uint)(fraction * 128) * 4;
+                                uint inputIndex0 = (uint)inputBufferIndex;
+
+                                fraction += ratio;
+
+                                uint baseIndex1 = ((uint)(fraction * 128) & 127) * 4;
+                                uint inputIndex1 = (uint)inputBufferIndex + (uint)fraction;
+
+                                fraction += ratio;
+
+                                uint baseIndex2 = ((uint)(fraction * 128) & 127) * 4;
+                                uint inputIndex2 = (uint)inputBufferIndex + (uint)fraction;
+
+                                fraction += ratio;
+
+                                uint baseIndex3 = ((uint)(fraction * 128) & 127) * 4;
+                                uint inputIndex3 = (uint)inputBufferIndex + (uint)fraction;
+
+                                fraction += ratio;
+                                inputBufferIndex += (int)fraction;
+
+                                // Only keep lower part (safe as fraction isn't supposed to be negative)
+                                fraction -= (int)fraction;
+
+                                Vector128<float> parameter0 = Sse.LoadVector128(pParameters + baseIndex0);
+                                Vector128<float> parameter1 = Sse.LoadVector128(pParameters + baseIndex1);
+                                Vector128<float> parameter2 = Sse.LoadVector128(pParameters + baseIndex2);
+                                Vector128<float> parameter3 = Sse.LoadVector128(pParameters + baseIndex3);
+
+                                Vector128<int> intInput0 = Sse41.ConvertToVector128Int32(pInput + inputIndex0);
+                                Vector128<int> intInput1 = Sse41.ConvertToVector128Int32(pInput + inputIndex1);
+                                Vector128<int> intInput2 = Sse41.ConvertToVector128Int32(pInput + inputIndex2);
+                                Vector128<int> intInput3 = Sse41.ConvertToVector128Int32(pInput + inputIndex3);
+
+                                Vector128<float> input0 = Sse2.ConvertToVector128Single(intInput0);
+                                Vector128<float> input1 = Sse2.ConvertToVector128Single(intInput1);
+                                Vector128<float> input2 = Sse2.ConvertToVector128Single(intInput2);
+                                Vector128<float> input3 = Sse2.ConvertToVector128Single(intInput3);
+
+                                Vector128<float> mix0 = Sse.Multiply(input0, parameter0);
+                                Vector128<float> mix1 = Sse.Multiply(input1, parameter1);
+                                Vector128<float> mix2 = Sse.Multiply(input2, parameter2);
+                                Vector128<float> mix3 = Sse.Multiply(input3, parameter3);
+
+                                Vector128<float> mix01 = Sse3.HorizontalAdd(mix0, mix1);
+                                Vector128<float> mix23 = Sse3.HorizontalAdd(mix2, mix3);
+
+                                Vector128<float> mix0123 = Sse3.HorizontalAdd(mix01, mix23);
+
+                                Sse.Store(pOutput + (uint)i, Sse41.RoundToNearestInteger(mix0123));
+                            }
+                        }
+                    }
+                }
+            }
+
+            for (; i < sampleCount; i++)
+            {
+                int baseIndex = (int)(fraction * 128) * 4;
+                ReadOnlySpan<float> parameter = parameters.Slice(baseIndex, 4);
+                ReadOnlySpan<short> currentInput = inputBuffer.Slice(inputBufferIndex, 4);
+
+                outputBuffer[i] = (float)Math.Round(currentInput[0] * parameter[0] +
+                                                    currentInput[1] * parameter[1] +
+                                                    currentInput[2] * parameter[2] +
+                                                    currentInput[3] * parameter[3]);
+
+                fraction += ratio;
+                inputBufferIndex += (int)fraction;
+
+                // Only keep lower part (safe as fraction isn't supposed to be negative)
+                fraction -= (int)fraction;
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static ReadOnlySpan<float> GetHighParameter(float ratio)
+        {
+            if (ratio <= 1.0f)
+            {
+                return _highCurveLut1F;
+            }
+            else if (ratio > 1.333313f)
+            {
+                return _highCurveLut0F;
+            }
+
+            return _highCurveLut2F;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static void ResampleHighQuality(Span<float> outputBuffer, ReadOnlySpan<short> inputBuffer, float ratio, ref float fraction, int sampleCount)
+        {
+            ReadOnlySpan<float> parameters = GetHighParameter(ratio);
+
+            int inputBufferIndex = 0;
+
+            // TODO: fast path
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                int baseIndex = (int)(fraction * 128) * 8;
+                ReadOnlySpan<float> parameter = parameters.Slice(baseIndex, 8);
+                ReadOnlySpan<short> currentInput = inputBuffer.Slice(inputBufferIndex, 8);
+
+                outputBuffer[i] = (float)Math.Round(currentInput[0] * parameter[0] +
+                                                    currentInput[1] * parameter[1] +
+                                                    currentInput[2] * parameter[2] +
+                                                    currentInput[3] * parameter[3] +
+                                                    currentInput[4] * parameter[4] +
+                                                    currentInput[5] * parameter[5] +
+                                                    currentInput[6] * parameter[6] +
+                                                    currentInput[7] * parameter[7]);
+
+                fraction += ratio;
+                inputBufferIndex += (int)MathF.Truncate(fraction);
+
+                fraction -= (int)fraction;
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void ResampleLowQuality(Span<float> outputBuffer, ReadOnlySpan<short> inputBuffer, float ratio, ref float fraction, int sampleCount)
+        {
+            int inputBufferIndex = 0;
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                int outputData = inputBuffer[inputBufferIndex];
+
+                if (fraction > 1.0f)
+                {
+                    outputData = inputBuffer[inputBufferIndex + 1];
+                }
+
+                outputBuffer[i] = outputData;
+
+                fraction += ratio;
+                inputBufferIndex += (int)MathF.Truncate(fraction);
+
+                fraction -= (int)fraction;
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void ResampleForUpsampler(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer, float ratio, ref float fraction, int sampleCount)
+        {
+            // TODO: use a bandwidth filter to have better resampling.
+            int inputBufferIndex = 0;
+
+            for (int i = 0; i < sampleCount; i++)
+            {
+                float outputData = inputBuffer[inputBufferIndex];
+
+                if (fraction > 1.0f)
+                {
+                    outputData = inputBuffer[inputBufferIndex + 1];
+                }
+
+                outputBuffer[i] = outputData;
+
+                fraction += ratio;
+                inputBufferIndex += (int)MathF.Truncate(fraction);
+
+                fraction -= (int)fraction;
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/State/AdpcmLoopContext.cs

@@ -0,0 +1,29 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp.State
+{
+    [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 6)]
+    public struct AdpcmLoopContext
+    {
+        public short PredScale;
+        public short History0;
+        public short History1;
+    }
+}

Ryujinx.Audio/Renderer/Dsp/State/AuxiliaryBufferHeader.cs

@@ -0,0 +1,60 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Memory;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp.State
+{
+    [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 0x40)]
+    public struct AuxiliaryBufferHeader
+    {
+        [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 0xC)]
+        public struct AuxiliaryBufferInfo
+        {
+            private const uint ReadOffsetPosition = 0x0;
+            private const uint WriteOffsetPosition = 0x4;
+
+            public uint ReadOffset;
+            public uint WriteOffset;
+            private uint _reserved;
+
+            public static uint GetReadOffset(IVirtualMemoryManager manager, ulong bufferAddress)
+            {
+                return manager.Read<uint>(bufferAddress + ReadOffsetPosition);
+            }
+
+            public static uint GetWriteOffset(IVirtualMemoryManager manager, ulong bufferAddress)
+            {
+                return manager.Read<uint>(bufferAddress + WriteOffsetPosition);
+            }
+
+            public static void SetReadOffset(IVirtualMemoryManager manager, ulong bufferAddress, uint value)
+            {
+                manager.Write(bufferAddress + ReadOffsetPosition, value);
+            }
+
+            public static void SetWriteOffset(IVirtualMemoryManager manager, ulong bufferAddress, uint value)
+            {
+                manager.Write(bufferAddress + WriteOffsetPosition, value);
+            }
+        }
+
+        public AuxiliaryBufferInfo BufferInfo;
+        public unsafe fixed uint Unknown[13];
+    }
+}

Ryujinx.Audio/Renderer/Dsp/State/BiquadFilterState.cs

@@ -0,0 +1,28 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Audio.Renderer.Dsp.State
+{
+    [StructLayout(LayoutKind.Sequential, Pack = 1, Size = 0x10)]
+    public struct BiquadFilterState
+    {
+        public float Z1;
+        public float Z2;
+    }
+}

Ryujinx.Audio/Renderer/Dsp/State/DelayState.cs

@@ -0,0 +1,73 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Dsp.Effect;
+using Ryujinx.Audio.Renderer.Parameter.Effect;
+
+namespace Ryujinx.Audio.Renderer.Dsp.State
+{
+    public class DelayState
+    {
+        public DelayLine[] DelayLines { get; }
+        public float[] LowPassZ { get; set; }
+        public float FeedbackGain { get; private set; }
+        public float DelayFeedbackBaseGain { get; private set; }
+        public float DelayFeedbackCrossGain { get; private set; }
+        public float LowPassFeedbackGain { get; private set; }
+        public float LowPassBaseGain { get; private set; }
+
+        private const int FixedPointPrecision = 14;
+
+        public DelayState(ref DelayParameter parameter, ulong workBuffer)
+        {
+            DelayLines = new DelayLine[parameter.ChannelCount];
+            LowPassZ = new float[parameter.ChannelCount];
+
+            uint sampleRate = (uint)FixedPointHelper.ToInt(parameter.SampleRate, FixedPointPrecision) / 1000;
+
+            for (int i = 0; i < DelayLines.Length; i++)
+            {
+                DelayLines[i] = new DelayLine(sampleRate, parameter.DelayTimeMax);
+                DelayLines[i].SetDelay(parameter.DelayTime);
+                LowPassZ[0] = 0;
+            }
+
+            UpdateParameter(ref parameter);
+        }
+
+        public void UpdateParameter(ref DelayParameter parameter)
+        {
+            FeedbackGain = FixedPointHelper.ToFloat(parameter.FeedbackGain, FixedPointPrecision) * 0.98f;
+
+            float channelSpread = FixedPointHelper.ToFloat(parameter.ChannelSpread, FixedPointPrecision);
+
+            DelayFeedbackBaseGain = (1.0f - channelSpread) * FeedbackGain;
+
+            if (parameter.ChannelCount == 4 || parameter.ChannelCount == 6)
+            {
+                DelayFeedbackCrossGain = channelSpread * 0.5f * FeedbackGain;
+            }
+            else
+            {
+                DelayFeedbackCrossGain = channelSpread * FeedbackGain;
+            }
+
+            LowPassFeedbackGain = 0.95f * FixedPointHelper.ToFloat(parameter.LowPassAmount, FixedPointPrecision);
+            LowPassBaseGain = 1.0f - LowPassFeedbackGain;
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/State/Reverb3dState.cs

@@ -0,0 +1,136 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Dsp.Effect;
+using Ryujinx.Audio.Renderer.Parameter.Effect;
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.State
+{
+    public class Reverb3dState
+    {
+        private readonly float[] FdnDelayMinTimes = new float[4] { 5.0f, 6.0f, 13.0f, 14.0f };
+        private readonly float[] FdnDelayMaxTimes = new float[4] { 45.704f, 82.782f, 149.94f, 271.58f };
+        private readonly float[] DecayDelayMaxTimes1 = new float[4] { 17.0f, 13.0f, 9.0f, 7.0f };
+        private readonly float[] DecayDelayMaxTimes2 = new float[4] { 19.0f, 11.0f, 10.0f, 6.0f };
+        private readonly float[] EarlyDelayTimes = new float[20] { 0.017136f, 0.059154f, 0.16173f, 0.39019f, 0.42526f, 0.45541f, 0.68974f, 0.74591f, 0.83384f, 0.8595f, 0.0f, 0.075024f, 0.16879f, 0.2999f, 0.33744f, 0.3719f, 0.59901f, 0.71674f, 0.81786f, 0.85166f };
+        public readonly float[] EarlyGain = new float[20] { 0.67096f, 0.61027f, 1.0f, 0.35680f, 0.68361f, 0.65978f, 0.51939f, 0.24712f, 0.45945f, 0.45021f, 0.64196f, 0.54879f, 0.92925f, 0.38270f, 0.72867f, 0.69794f, 0.5464f, 0.24563f, 0.45214f, 0.44042f };
+
+        public IDelayLine[] FdnDelayLines { get; }
+        public DecayDelay[] DecayDelays1 { get; }
+        public DecayDelay[] DecayDelays2 { get; }
+        public IDelayLine PreDelayLine { get; }
+        public IDelayLine BackLeftDelayLine { get; }
+        public float DryGain { get; private set; }
+        public uint[] EarlyDelayTime { get; private set; }
+        public float PreviousPreDelayValue { get; set; }
+        public float PreviousPreDelayGain { get; private set; }
+        public float TargetPreDelayGain { get; private set; }
+        public float EarlyReflectionsGain { get; private set; }
+        public float LateReverbGain { get; private set; }
+        public uint ReflectionDelayTime { get; private set; }
+        public float EchoLateReverbDecay { get; private set; }
+        public float[] DecayDirectFdnGain { get; private set; }
+        public float[] DecayCurrentFdnGain { get; private set; }
+        public float[] DecayCurrentOutputGain { get; private set; }
+        public float[] PreviousFeedbackOutputDecayed { get; private set; }
+
+        public Reverb3dState(ref Reverb3dParameter parameter, ulong workBuffer)
+        {
+            FdnDelayLines = new IDelayLine[4];
+            DecayDelays1 = new DecayDelay[4];
+            DecayDelays2 = new DecayDelay[4];
+            DecayDirectFdnGain = new float[4];
+            DecayCurrentFdnGain = new float[4];
+            DecayCurrentOutputGain = new float[4];
+            PreviousFeedbackOutputDecayed = new float[4];
+
+            uint sampleRate = parameter.SampleRate / 1000;
+
+            for (int i = 0; i < 4; i++)
+            {
+                FdnDelayLines[i] = new DelayLine3d(sampleRate, FdnDelayMaxTimes[i]);
+                DecayDelays1[i] = new DecayDelay(new DelayLine3d(sampleRate, DecayDelayMaxTimes1[i]));
+                DecayDelays2[i] = new DecayDelay(new DelayLine3d(sampleRate, DecayDelayMaxTimes2[i]));
+            }
+
+            PreDelayLine = new DelayLine3d(sampleRate, 400);
+            BackLeftDelayLine = new DelayLine3d(sampleRate, 5);
+
+            UpdateParameter(ref parameter);
+        }
+
+        public void UpdateParameter(ref Reverb3dParameter parameter)
+        {
+            uint sampleRate = parameter.SampleRate / 1000;
+
+            EarlyDelayTime = new uint[20];
+            DryGain = parameter.DryGain;
+            PreviousFeedbackOutputDecayed.AsSpan().Fill(0);
+            PreviousPreDelayValue = 0;
+
+            EarlyReflectionsGain = FloatingPointHelper.Pow10(Math.Min(parameter.RoomGain + parameter.ReflectionsGain, 5000.0f) / 2000.0f);
+            LateReverbGain = FloatingPointHelper.Pow10(Math.Min(parameter.RoomGain + parameter.ReverbGain, 5000.0f) / 2000.0f);
+
+            float highFrequencyRoomGain = FloatingPointHelper.Pow10(parameter.RoomHf / 2000.0f);
+
+            if (highFrequencyRoomGain < 1.0f)
+            {
+                float tempA = 1.0f - highFrequencyRoomGain;
+                float tempB = 2.0f - ((2.0f * highFrequencyRoomGain) * FloatingPointHelper.Cos(256.0f * parameter.HfReference / parameter.SampleRate));
+                float tempC = MathF.Sqrt(MathF.Pow(tempB, 2) - (4.0f * (1.0f - highFrequencyRoomGain) * (1.0f - highFrequencyRoomGain)));
+
+                PreviousPreDelayGain = (tempB - tempC) / (2.0f * tempA);
+                TargetPreDelayGain = 1.0f - PreviousPreDelayGain;
+            }
+            else
+            {
+                PreviousPreDelayGain = 0.0f;
+                TargetPreDelayGain = 1.0f;
+            }
+
+            ReflectionDelayTime = IDelayLine.GetSampleCount(sampleRate, 1000.0f * (parameter.ReflectionDelay + parameter.ReverbDelayTime));
+            EchoLateReverbDecay = 0.6f * parameter.Diffusion * 0.01f;
+
+            for (int i = 0; i < FdnDelayLines.Length; i++)
+            {
+                FdnDelayLines[i].SetDelay(FdnDelayMinTimes[i] + (parameter.Density / 100 * (FdnDelayMaxTimes[i] - FdnDelayMinTimes[i])));
+
+                uint tempSampleCount = FdnDelayLines[i].CurrentSampleCount + DecayDelays1[i].CurrentSampleCount + DecayDelays2[i].CurrentSampleCount;
+
+                float tempA = (-60.0f * tempSampleCount) / (parameter.DecayTime * parameter.SampleRate);
+                float tempB = tempA / parameter.HfDecayRatio;
+                float tempC = FloatingPointHelper.Cos(128.0f * 0.5f * parameter.HfReference / parameter.SampleRate) / FloatingPointHelper.Sin(128.0f * 0.5f * parameter.HfReference / parameter.SampleRate);
+                float tempD = FloatingPointHelper.Pow10((tempB - tempA) / 40.0f);
+                float tempE = FloatingPointHelper.Pow10((tempB + tempA) / 40.0f) * 0.7071f;
+
+                DecayDirectFdnGain[i] = tempE * ((tempD * tempC) + 1.0f) / (tempC + tempD);
+                DecayCurrentFdnGain[i] = tempE * (1.0f - (tempD * tempC)) / (tempC + tempD);
+                DecayCurrentOutputGain[i] = (tempC - tempD) / (tempC + tempD);
+
+                DecayDelays1[i].SetDecayRate(EchoLateReverbDecay);
+                DecayDelays2[i].SetDecayRate(EchoLateReverbDecay * -0.9f);
+            }
+
+            for (int i = 0; i < EarlyDelayTime.Length; i++)
+            {
+                uint sampleCount = Math.Min(IDelayLine.GetSampleCount(sampleRate, (parameter.ReflectionDelay * 1000.0f) + (EarlyDelayTimes[i] * 1000.0f * ((parameter.ReverbDelayTime * 0.9998f) + 0.02f))), PreDelayLine.SampleCountMax);
+                EarlyDelayTime[i] = sampleCount;
+            }
+        }
+    }
+}

Ryujinx.Audio/Renderer/Dsp/State/ReverbState.cs

@@ -0,0 +1,221 @@
+//
+// Copyright (c) 2019-2021 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using Ryujinx.Audio.Renderer.Common;
+using Ryujinx.Audio.Renderer.Dsp.Effect;
+using Ryujinx.Audio.Renderer.Parameter.Effect;
+using System;
+
+namespace Ryujinx.Audio.Renderer.Dsp.State
+{
+    public class ReverbState
+    {
+        private static readonly float[] FdnDelayTimes = new float[20]
+        {
+            // Room
+            53.953247f, 79.192566f, 116.238770f, 130.615295f,
+            // Hall
+            53.953247f, 79.192566f, 116.238770f, 170.615295f,
+            // Plate
+            5f, 10f, 5f, 10f,
+            // Cathedral
+            47.03f, 71f, 103f, 170f,
+            // Max delay (Hall is the one with the highest values so identical to Hall)
+            53.953247f, 79.192566f, 116.238770f, 170.615295f,
+        };
+
+        private static readonly float[] DecayDelayTimes = new float[20]
+        {
+            // Room
+            7f, 9f, 13f, 17f,
+            // Hall
+            7f, 9f, 13f, 17f,
+            // Plate (no decay)
+            1f, 1f, 1f, 1f,
+            // Cathedral
+            7f, 7f, 13f, 9f,
+            // Max delay (Hall is the one with the highest values so identical to Hall)
+            7f, 9f, 13f, 17f,
+        };
+
+        private static readonly float[] EarlyDelayTimes = new float[50]
+        {
+            // Room
+            0.0f, 3.5f, 2.8f, 3.9f, 2.7f, 13.4f, 7.9f, 8.4f, 9.9f, 12.0f,
+            // Chamber
+            0.0f, 11.8f, 5.5f, 11.2f, 10.4f, 38.1f, 22.2f, 29.6f, 21.2f, 24.8f,
+            // Hall
+            0.0f, 41.5f, 20.5f, 41.3f, 0.0f, 29.5f, 33.8f, 45.2f, 46.8f, 0.0f,
+            // Cathedral
+            33.1f, 43.3f, 22.8f, 37.9f, 14.9f, 35.3f, 17.9f, 34.2f, 0.0f, 43.3f,
+            // Disabled
+            0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f
+        };
+
+        private static readonly float[] EarlyGainBase = new float[50]
+        {
+            // Room
+            0.70f, 0.68f, 0.70f, 0.68f, 0.70f, 0.68f, 0.70f, 0.68f, 0.68f, 0.68f,
+            // Chamber
+            0.70f, 0.68f, 0.70f, 0.68f, 0.70f, 0.68f, 0.68f, 0.68f, 0.68f, 0.68f, 
+            // Hall
+            0.50f, 0.70f, 0.70f, 0.68f, 0.50f, 0.68f, 0.68f, 0.70f, 0.68f, 0.00f,
+            // Cathedral
+            0.93f, 0.92f, 0.87f, 0.86f, 0.94f, 0.81f, 0.80f, 0.77f, 0.76f, 0.65f,
+            // Disabled
+            0.00f, 0.00f, 0.00f, 0.00f, 0.00f, 0.00f, 0.00f, 0.00f, 0.00f, 0.00f
+        };
+
+        private static readonly float[] PreDelayTimes = new float[5]
+        {
+            // Room
+            12.5f,
+            // Chamber
+            40.0f,
+            // Hall
+            50.0f,
+            // Cathedral
+            50.0f,
+            // Disabled
+            0.0f
+        };
+
+        public IDelayLine[] FdnDelayLines { get; }
+        public DecayDelay[] DecayDelays { get; }
+        public IDelayLine PreDelayLine { get; }
+        public IDelayLine BackLeftDelayLine { get; }
+        public uint[] EarlyDelayTime { get; }
+        public float[] EarlyGain { get; }
+        public uint PreDelayLineDelayTime { get; private set; }
+
+        public float[] HighFrequencyDecayDirectGain { get; }
+        public float[] HighFrequencyDecayPreviousGain { get; }
+        public float[] PreviousFeedbackOutput { get; }
+
+        public const int EarlyModeCount = 10;
+
+        private const int FixedPointPrecision = 14;
+
+        private ReadOnlySpan<float> GetFdnDelayTimesByLateMode(ReverbLateMode lateMode)
+        {
+            return FdnDelayTimes.AsSpan().Slice((int)lateMode * 4, 4);
+        }
+
+        private ReadOnlySpan<float> GetDecayDelayTimesByLateMode(ReverbLateMode lateMode)
+        {
+            return DecayDelayTimes.AsSpan().Slice((int)lateMode * 4, 4);
+        }
+
+        public ReverbState(ref ReverbParameter parameter, ulong workBuffer, bool isLongSizePreDelaySupported)
+        {
+            FdnDelayLines = new IDelayLine[4];
+            DecayDelays = new DecayDelay[4];
+            EarlyDelayTime = new uint[EarlyModeCount];
+            EarlyGain = new float[EarlyModeCount];
+            HighFrequencyDecayDirectGain = new float[4];
+            HighFrequencyDecayPreviousGain = new float[4];
+            PreviousFeedbackOutput = new float[4];
+
+            ReadOnlySpan<float> fdnDelayTimes = GetFdnDelayTimesByLateMode(ReverbLateMode.Limit);
+            ReadOnlySpan<float> decayDelayTimes = GetDecayDelayTimesByLateMode(ReverbLateMode.Limit);
+
+            uint sampleRate = (uint)FixedPointHelper.ToFloat((uint)parameter.SampleRate, FixedPointPrecision);
+
+            for (int i = 0; i < 4; i++)
+            {
+                FdnDelayLines[i] = new DelayLine(sampleRate, fdnDelayTimes[i]);
+                DecayDelays[i] = new DecayDelay(new DelayLine(sampleRate, decayDelayTimes[i]));
+            }
+
+            float preDelayTimeMax = 150.0f;
+
+            if (isLongSizePreDelaySupported)
+            {
+                preDelayTimeMax = 350.0f;
+            }
+
+            PreDelayLine = new DelayLine(sampleRate, preDelayTimeMax);
+            BackLeftDelayLine = new DelayLine(sampleRate, 5.0f);
+
+            UpdateParameter(ref parameter);
+        }
+
+        public void UpdateParameter(ref ReverbParameter parameter)
+        {
+            uint sampleRate = (uint)FixedPointHelper.ToFloat((uint)parameter.SampleRate, FixedPointPrecision);
+
+            float preDelayTimeInMilliseconds = FixedPointHelper.ToFloat(parameter.PreDelayTime, FixedPointPrecision);
+            float earlyGain = FixedPointHelper.ToFloat(parameter.EarlyGain, FixedPointPrecision);
+            float coloration = FixedPointHelper.ToFloat(parameter.Coloration, FixedPointPrecision);
+            float decayTime = FixedPointHelper.ToFloat(parameter.DecayTime, FixedPointPrecision);
+
+            for (int i = 0; i < 10; i++)
+            {
+                EarlyDelayTime[i] = Math.Min(IDelayLine.GetSampleCount(sampleRate, EarlyDelayTimes[i] + preDelayTimeInMilliseconds), PreDelayLine.SampleCountMax) + 1;
+                EarlyGain[i] = EarlyGainBase[i] * earlyGain;
+            }
+
+            if (parameter.ChannelCount == 2)
+            {
+                EarlyGain[4] = EarlyGain[4] * 0.5f;
+                EarlyGain[5] = EarlyGain[5] * 0.5f;
+            }
+
+            PreDelayLineDelayTime = Math.Min(IDelayLine.GetSampleCount(sampleRate, PreDelayTimes[(int)parameter.EarlyMode] + preDelayTimeInMilliseconds), PreDelayLine.SampleCountMax);
+
+            ReadOnlySpan<float> fdnDelayTimes = GetFdnDelayTimesByLateMode(parameter.LateMode);
+            ReadOnlySpan<float> decayDelayTimes = GetDecayDelayTimesByLateMode(parameter.LateMode);
+
+            float highFrequencyDecayRatio = FixedPointHelper.ToFloat(parameter.HighFrequencyDecayRatio, FixedPointPrecision);
+            float highFrequencyUnknownValue = FloatingPointHelper.Cos(1280.0f / sampleRate);
+
+            for (int i = 0; i < 4; i++)
+            {
+                FdnDelayLines[i].SetDelay(fdnDelayTimes[i]);
+                DecayDelays[i].SetDelay(decayDelayTimes[i]);
+
+                float tempA = -3 * (DecayDelays[i].CurrentSampleCount + FdnDelayLines[i].CurrentSampleCount);
+                float tempB = tempA / (decayTime * sampleRate);
+                float tempC;
+                float tempD;
+
+                if (highFrequencyDecayRatio < 0.995f)
+                {
+                    float tempE = FloatingPointHelper.Pow10((((1.0f / highFrequencyDecayRatio) - 1.0f) * 2) / 100 * (tempB / 10));
+                    float tempF = 1.0f - tempE;
+                    float tempG = 2.0f - (tempE * 2 * highFrequencyUnknownValue);
+                    float tempH = MathF.Sqrt((tempG * tempG) - (tempF * tempF * 4));
+
+                    tempC = (tempG - tempH) / (tempF * 2);
+                    tempD = 1.0f - tempC;
+                }
+                else
+                {
+                    // no high frequency decay ratio
+                    tempC = 0.0f;
+                    tempD = 1.0f;
+                }
+
+                HighFrequencyDecayDirectGain[i] = FloatingPointHelper.Pow10(tempB / 1000) * tempD * 0.7071f;
+                HighFrequencyDecayPreviousGain[i] = tempC;
+                PreviousFeedbackOutput[i] = 0.0f;
+
+                DecayDelays[i].SetDecayRate(0.6f * (1.0f - coloration));
+            }
+        }
+    }
+}