Hi, I am interested in decoding multichannel Higher-Order Ambisonics feeds to the Spatial Audio renderer discussed in the "Immerse your app in spatial audio" WWDC21 talk. However, I could not find any documentation about which multichannel audio formats are actually supported by the renderer, and a search for "Ambisonics" in the developer documentation only contains results pertaining to the Audio DriverKit. Can someone please enlighten me? Thank you!

I’m able to configure a 7.1.4 surround in audio midi settings, and it correctly output Dolby Atmos content from Apple Music app, all 11.1 channels have signal. But I can’t get anything more than 5.1 outside of official app, any local 7.1 ec3 or 5.1 ec3 with Atmos elementary stream / in MP4 container will only output 5.1. Is there a plan to solve this problem / add this feature in the future?

I'm attempting to create an app that uses the spatial audio API but doesn't play audio the whole time. I want the user to be able to listen to other media outside my app but gather X Y & Z axis information most of the time the app is running in the background. Does anyone know if this is possible?