Hi,
We would like to route our in-game voice chat to the XBox X/S specific voice bus. At the moment we have a TRC failure because all the game and voice audio is mixed into one channel and the voice audio needs to be attached to a separate voice bus on the console so it can be mixed separately into headsets etc…
At the moment I’ve tried to use this code to route our voice channel to the console voice port:
global::FMOD.RESULT result = FMODUnity.RuntimeManager.CoreSystem.attachChannelGroupToPort(global::FMOD.PORT_TYPE.VOICE, global::FMOD.PORT_INDEX.NONE, _voiceChannelGroup);
On XBox this fails with this error:
[FMOD] WASAPI_OpenPort : Port type 2 is not supported on this platform.
attachChannelGroupToPort failed with ERR_UNSUPPORTED
I thought this might be because it’s using the Windows API on the dev-kit so I added a custom ‘GameCore - Scarlett’ platform specific entry in the FMOD settings.
This produced the same error so I tried changing the output mode to ‘Windows Sonic’ and now I get this error:
[FMOD] WinSonic_OpenPort : FMOD_PORT_TYPE_VOICE is not supported on this platform.
attachChannelGroupToPort failed with ERR_INVALID_PARAM
Is there a way to route a particular FMOD bus to the console voice bus on XBox X/S? I can see from other forum posts that the PS5 has a controller speaker which requires the user ID so I maybe that’s what I should be doing on XBox but I’m not sure what the syntax is. I’ve tried passing the current user ID as the port number too using this code:
global::FMOD.RESULT result = FMODUnity.RuntimeManager.CoreSystem.attachChannelGroupToPort(global::FMOD.PORT_TYPE.CONTROLLER, userXuid, _voiceChannelGroup);
and it fails with this error:
[FMOD] WASAPI_OpenPort : XUserGetDefaultAudioEndpointUtf16 returned 0x80070490.
attachChannelGroupToPort failed with ERR_OUTPUT_INIT
Here are the various SDK versions we’re using:
Unity 6000.4.12f1
FMOD Studio 2.03.14
GDK October 2025 GDKX (10.0.26100.6194)
Thanks in advance for any help!