These steps solved audio issues on my system (Tuxedo OS), but should be
applicable to any PipeWire/PulseAudio system that has more than one
audio interface.

I suspect that enabling `rtc_use_pipewire` in [LiveKit SDK](https://github.com/livekit/rust-sdks/blob/0773bcec4e24812b382e71166b2ab359bf1a9384/webrtc-sys/libwebrtc/build_linux.sh#L105C1-L105C27)
could help as well, but I haven't tried it.

Release Notes:

- N/A