Acoustic Ray Tracing for Unity does not make any sound

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:

• https://communityforums.atmeta.com/t5/Unity-Development/Are-there-any-samples-of-Acoustic-Ray-Tracing-for-Unity/m-p/1233793#M25114

• https://communityforums.atmeta.com/t5/Unity-Development/Acoustic-Ray-Tracing-for-Unity-does-not-make-any-sound/td-p/1233816

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!