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Acoustic Ray Tracing for Unity does not make any sound

maumau.tuna
Explorer

‎08-23-2024 07:07 PM

I should have done everything I should do, but my test project does not make any sound with Acoustic Ray Tracing of Meta XR Audio SDK. What are the likely solutions? The project makes sounds normally when I disable Acoustic Ray Tracing.
 
My environment
- Windows 11
- Unity 2022.3.36f1
- Visual Studio 2022
- My Unity project is a simple non-XR 3D maze
 
 
What I did:
(1) Installed Meta XR Audio SDK Plugin for Unity tarball into my Unity project, following "Method 2: Download via the Meta Quest Developer Center" in [1].
 
(2) Set up my Unity project to enable Meta XR Audio SDK, following "Unity Project Setup" in [1]. The project settings is [2].
 
(3) The sounds are imported into Unity by forcing them to mono [3].
 
(4) Enable spatialization on my AudioSource components as per "Implementation" in [4]. The resulting setting is [5]. Attached the script MetaXRAudioSource.cs to the Audio Source’s GameObject. The optional MetaXRAudioSourceExperimentalFeatures.cs is not attached.
 
(5) Attached the sample SpatializerMixer, which is included in Meta XR Audio SDK, to the output of AudioSource components, following "Setup the Audio Mixer" in [6]. The resulting setting is [5].
 
(6) Added Acoustic Geometry as per [7]. Specifically, attached an MetaXRAcousticGeometry component to the parent GameObject that have various geometries like walls, floor, and ceiling as its children. "Include Child Meshes" is enabled. The resulting setting is [8].
Then baked the acoustic geometry. The baked data is generated in the file StreamingAssets/Acoustics/<scene name>/<parent GameObject name>.xrageo.
 
(7) Added a new GameObject and attached the MetaXRAcousticMap component to it, as per [9]. The resulting setting is [10].
Then baked the acoustic map. The Unity Editor's Inspector shows the acoustic map as READY. The baked data is generated in the file StreamingAssets/Acoustics/<scene name>.xramap.
 
(8) Played the scene in the Unity Editor, but I can hear no sound from spatialized audio. On the other hand, non-spatialized audio make sounds.
However, the Unity console shows that the acoustic geometry and map are loaded successfully as follows:
 
Found data in default location: StreamingAssets/Acoustics/Level 1.xramap
...
Applying Acoustic Propagation Settings: [acoustic model = Automatic], [diffraction = True], 
...
Setting spatial voice limit: 64
...
Loading Geometry Maze1 from StreamingAssets C:/Unity/projects/amaze3d/Assets/StreamingAssets/Acoustics\Level 1\Maze1.xrageo
...
No Meta XR Audio Room found, setting default room
...
Fallback handler could not load library C:/Program Files/Unity/Hub/Editor/2022.3.36f1/Editor/Data/MonoBleedingEdge/lib/MetaXRAudioWwise
...
Fallback handler could not load library C:/Program Files/Unity/Hub/Editor/2022.3.36f1/Editor/Data/MonoBleedingEdge/lib/libMetaXRAudioFMOD
Meta XR Audio Native Interface initialized with Unity plugin
...
Geometry Maze1, read time = 0.02320397
...
Sucessfully loaded Geometry Maze1, load time = 0.06603026
...
Simplified mesh with 3563 vertices
...
 
 
 
References
[1] 
Meta XR Audio SDK Plugin for Unity - Requirements and Setup
 
[2] ProjectSettings/AudioManager.asset
...
  m_Volume: 1
  Rolloff Scale: 1
  Doppler Factor: 1
  Default Speaker Mode: 2
  m_SampleRate: 0
  m_DSPBufferSize: 256
  m_VirtualVoiceCount: 512
  m_RealVoiceCount: 32
  m_EnableOutputSuspension: 1
  m_SpatializerPlugin: Meta XR Audio
  m_AmbisonicDecoderPlugin: Meta XR Audio
  m_DisableAudio: 0
  m_VirtualizeEffects: 1
  m_RequestedDSPBufferSize: 256
 
[3]
<sound file name>.mp3.meta
...
  forceToMono: 1
...
  ambisonic: 0
  3D: 1
...
 
[4]
Apply Spatialization in Unity
 
[5]
FPSController.prefab
...
--- !u!82 &8200000
AudioSource:
...
  m_Enabled: 1
  serializedVersion: 4
  m_PlayOnAwake: 1
  m_Volume: 1
  m_Pitch: 1
  Loop: 0
  Mute: 0
  Spatialize: 1
  SpatializePostEffects: 0
  Priority: 128
  DopplerLevel: 0
  MinDistance: 1
  MaxDistance: 100
  Pan2D: 0
  rolloffMode: 2
  BypassEffects: 0
  BypassListenerEffects: 0
  BypassReverbZones: 0
...
--- !u!114 &8500000
MonoBehaviour:
...
  m_Enabled: 1
  m_EditorHideFlags: 0
  m_Script: {fileID: 11500000, guid: a07f270ac36c49789466c75ceb88424c, type: 3}
...
  enableSpatialization: 1
  gainBoostDb: 10
  enableAcoustics: 1
  reverbSendDb: 0
 
[6]
Apply Room Acoustics in Unity
 
[7]
Acoustic Geometry in Acoustic Ray Tracing for Unity
 
[8]
Level1.unity
...
--- !u!114 &2007814857
MonoBehaviour:
...
  m_Enabled: 1
  m_EditorHideFlags: 0
  m_Script: {fileID: 11500000, guid: 46bc5ac24d7ec0348bb607bf4ed1f00d, type: 3}
...
  IncludeChildMeshes: 1
  relativeFilePath: StreamingAssets/Acoustics/Level 1/Maze1.xrageo
 
[9]
Acoustic Maps in Acoustic Ray Tracing for Unity
 
[10]
Level1.unity
...
--- !u!1 &2008814857
GameObject:
  m_ObjectHideFlags: 0
...
  m_Component:
  - component: {fileID: 2008814859}
  - component: {fileID: 2008814858}
  m_Layer: 0
  m_Name: Test Acoustic Map
  m_TagString: Untagged
...
  m_StaticEditorFlags: 0
  m_IsActive: 1
--- !u!4 &2008814859
Transform:
  m_ObjectHideFlags: 0
...
  m_GameObject: {fileID: 2008814857}
  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
  m_LocalPosition: {x: 0, y: 0, z: 0}
  m_LocalScale: {x: 1, y: 1, z: 1}
  m_ConstrainProportionsScale: 0
  m_Children: []
  m_Father: {fileID: 0}
  m_RootOrder: 0
  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
--- !u!114 &2008814858
MonoBehaviour:
  m_ObjectHideFlags: 0
...
  m_GameObject: {fileID: 2008814857}
  m_Enabled: 1
  m_EditorHideFlags: 0
  m_Script: {fileID: 11500000, guid: a96b764f28a53ab488bd80d19c0c167a, type: 3}
...
 
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8 REPLIES 8

maumau.tuna
Explorer

‎08-23-2024 05:01 PM

Can I get any samples for Unity that use the Acoustic Ray Tracing in Meta XR Audio SDK? There doesn't seem like anything even in the latest SDK version 68, which was released on Aug 21, 2024. I need examples that really work, because my test project doesn't make any sound when I switch to Acoustic Ray Tracing mode.

fefemate
Honored Guest
In response to maumau.tuna

Friday

I have the exact same problem, did you manage to solve it?

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fefemate
Honored Guest

Friday

Hi everyone,

I came across these two threads that describe exactly the same problem I'm currently facing with the Meta XR Acoustic Ray Tracing system:

In short:

  • I have a properly configured scene with MetaXRAcousticGeometry, MetaXRAcousticMaterial, and a valid MeshCollider.

  • The geometry is being loaded (confirmed in the console), and the acoustic rays appear to be active.

  • However, there is either no audible reverb, or the sound becomes extremely quiet when geometry is enabled.

  • Once I remove the geometry, the audio becomes louder again — but of course, spatial acoustic effects are lost.

I've already verified:

  • MetaXRAudioSource is enabled with Gain = 1.0 and ReverbSendLevel = 1.0

  • The mesh is valid (not empty, and vertex count > 0)

  • Spatialization is enabled, and the listener is positioned correctly

  • Tried both with and without MetaXRAudioRoom

My question is:
Has anyone in the community — or from Meta — found any working solution or explanation for this behavior in the past year?

Any updated guidance, examples, or even diagnostic tips would be greatly appreciated.

Thanks in advance!

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maumau.tuna
Explorer
In response to fefemate

Friday

No, I couldn't figure out what was wrong with my application above. However, I could successfully use the Acoustic Ray Tracing with another application.

0 Kudos

fefemate
Honored Guest
In response to maumau.tuna

Friday

What do you mean with another application? You replace unity or the sdk?

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CaseyAtMeta
Community Manager
Community Manager
In response to fefemate

Friday

Just FYI I've merged your report into the other ones so we can consolidate all the data into one place! Thanks for letting us know about this.

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maumau.tuna
Explorer
In response to fefemate

Friday

No, I used the same version of Unity and Meta XR Audio SDK to add spatialize audio in another application (game).

 

 

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fefemate
Honored Guest
In response to maumau.tuna

2 hours ago

The problem is that I’ve tried it several times already, but it has never worked, even though I built the project from scratch. Could you maybe send me an example or sample or specify a version that you used?

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