# Resonance Audio Source doesn't work **URL:** \ **Category:** FMOD Engine\ **Created:** [November 14, 2019, 1:59am UTC](https://qa.fmod.com/t/resonance-audio-source-doesnt-work/15215 "2019-11-14T01:59:22Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![lightsome](https://avatars.discourse-cdn.com/v4/letter/l/e56c9b/32.png) [@lightsome](https://qa.fmod.com/u/lightsome)\ **Post date:** [November 14, 2019, 1:59am UTC](https://qa.fmod.com/t/resonance-audio-source-doesnt-work/15215/1 "2019-11-14T01:59:22Z")
Dear experienced developers, ``` I've spent many months with trying Resonance Audio and it almost drove me crazy. Please help me, ``` I need to finally solve this problem and use Resonance Audio in a school project. # Problem description When I try to change 3d attributes of Resonance Audio Source DSP, the sound doesn’t seem to be afected at all. It seems that just ## Used technologies - CSharp - Official FMOD wrapper - FMOD version 1.10.16 - Resonance Audio plugin # Code using System; using System.Runtime.InteropServices; using FMOD; namespace FmodResonanceTest { internal class Program { private static FMOD.System \_fmod; private static Channel \_channel; private static DSP \_listenerDSP; private static uint \_listenerHandle; private static ChannelGroup \_masterGroup; private static uint \_raHandle; private static Sound \_sound; private static DSP \_soundFieldDSP; private static uint \_soundFieldHandle; private static DSP \_sourceDSP; private static uint \_sourceHandle; private static ChannelGroup \_worldGroup; ``` private static byte[] GetBytes(IntPtr ptr, int length) { if (ptr != IntPtr.Zero) { byte[] byteArray = new byte[length]; Marshal.Copy(ptr, byteArray, 0, length); return byteArray; } // Return an empty array if the pointer is null. return new byte[1]; } private static void Check(RESULT r, string activity) { if (r != RESULT.OK) throw new InvalidOperationException(activity); } private static void Say(string s, bool wait = true) { Console.WriteLine(s); if (wait) Wait(); } private static void Set3dParameters(DSP sourceDSP, DSP_PARAMETER_3DATTRIBUTES param3d) { int propertiesSize = Marshal.SizeOf(typeof(DSP_PARAMETER_3DATTRIBUTES)); IntPtr propertiesPtr = Marshal.AllocHGlobal(propertiesSize); Marshal.StructureToPtr(param3d, propertiesPtr, false); Check(sourceDSP.setParameterData(8, GetBytes(propertiesPtr, propertiesSize)), "Sending 3d properties to source DSP"); Marshal.FreeHGlobal(propertiesPtr); } private static void TestSet3dParameters() { _sourceDSP.setParameterFloat(0, 24f); DSP_PARAMETER_3DATTRIBUTES param3d = new DSP_PARAMETER_3DATTRIBUTES() { relative = new _3D_ATTRIBUTES() { position = new VECTOR() { x = 0f, y = 0f, z = 0f }, velocity = new VECTOR() { x = 0f, y = 0f, z = 0f }, forward = new VECTOR() { x = 0f, y = 0f, z = 0f }, up = new VECTOR() { x = 0f, y = 0f, z = 0f } }, absolute = new _3D_ATTRIBUTES() { position = new VECTOR() { x = -5f, y = -5f, z = 0f }, velocity = new VECTOR() { x = 0f, y = 0f, z = 0f }, forward = new VECTOR() { x = 0f, y = 0f, z = 0f }, up = new VECTOR() { x = 0f, y = 0f, z = 0f } } }; Set3dParameters(_sourceDSP, param3d); } private static void TestSetRoomProperties() { // set the room properties RoomProperties roomProperties = new RoomProperties() { // listener position positionX = 0f, positionY = 0f, positionZ = 0f, // room dimensions dimensionsX = 4f, dimensionsY = 5f, dimensionsZ = 4f, // listener orientation rotationX = 0f, rotationY = 0f, rotationZ = 0f, rotationW = 0f, // surface materials of all sides of the room materialLeft = SurfaceMaterial.ConcreteBlockPainted, materialRight = SurfaceMaterial.ConcreteBlockPainted, materialBottom = SurfaceMaterial.LinoleumOnConcrete, materialTop = SurfaceMaterial.ConcreteBlockPainted, materialFront = SurfaceMaterial.WoodPanel, materialBack = SurfaceMaterial.GlassThin, // reverb parameters reflectivity = 0f, reverbGainDb = 1f, reverbBrightness = -1f, reverbTime = .1f }; UpdateAudioRoom(_listenerDSP, roomProperties); } private static void UpdateAudioRoom(FMOD.DSP listenerPlugin, RoomProperties roomProperties) { int roomPropertiesSize = Marshal.SizeOf(typeof(RoomProperties)); IntPtr roomPropertiesPtr = Marshal.AllocHGlobal(roomPropertiesSize); Marshal.StructureToPtr(roomProperties, roomPropertiesPtr, false); listenerPlugin.setParameterData(1, GetBytes(roomPropertiesPtr, roomPropertiesSize)); Marshal.FreeHGlobal(roomPropertiesPtr); } private static void Wait() { Console.WriteLine("Press a key"); Console.ReadLine(); } [STAThread] private static void Main(string[] args) { // initialization Factory.System_Create(out _fmod); Check(_fmod.init(32, INITFLAGS.NORMAL, IntPtr.Zero), "FMOD initialization"); Check(_fmod.loadPlugin("resonanceaudio.dll", out _raHandle), "Loading Resonance Audio plugin"); Check(_fmod.getNestedPlugin(_raHandle, 0, out _listenerHandle), "Getting handle of Listener nested plugin"); Check(_fmod.getNestedPlugin(_raHandle, 1, out _soundFieldHandle), "Getting handle of Near Field nested plugin"); Check(_fmod.getNestedPlugin(_raHandle, 2, out _sourceHandle), "Getting handle of Source nested plugin"); Check(_fmod.createDSPByPlugin(_listenerHandle, out _listenerDSP), "Listener DSP creation"); Check(_fmod.createDSPByPlugin(_soundFieldHandle, out _soundFieldDSP), "Near Field DSP creation"); Check(_fmod.createDSPByPlugin(_sourceHandle, out _sourceDSP), "Source DSP creation"); Check(_fmod.createChannelGroup("world", out _worldGroup), "Creating channel group"); _fmod.getMasterChannelGroup(out _masterGroup); Check(_masterGroup.addGroup(_worldGroup, true, out DSPConnection dc), "Adding new channel group to master group"); Check(_worldGroup.addDSP(CHANNELCONTROL_DSP_INDEX.TAIL, _listenerDSP), "Applying Listener DSP on channel group"); Check(_fmod.createSound("sound.wav", MODE.DEFAULT, out _sound), "Loading sound"); Check(_fmod.playSound(_sound, _worldGroup, true, out _channel), "Sound playback"); Check(_channel.addDSP(FMOD.CHANNELCONTROL_DSP_INDEX.TAIL, _soundFieldDSP), "Applying Near Field DSP on channel"); Check(_channel.addDSP(FMOD.CHANNELCONTROL_DSP_INDEX.TAIL, _sourceDSP), "Applying Source DSP on channel"); TestSetRoomProperties(); TestSet3dParameters(); // start playback _channel.setPaused(false); Wait(); _fmod.release(); } } ``` } ---
**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\ **Post date:** [November 20, 2019, 9:30pm UTC](https://qa.fmod.com/t/resonance-audio-source-doesnt-work/15215/2 "2019-11-20T21:30:35Z")
Nothing stands out in the code provided. Are you using the fmod logging libs? They can provide more logging information for debugging. Can you confirm that `propertiesPtr` is valid and that `GetBytes` is returning a valid byte array?