Audio setup (ALSA/Pulseaudio) not working properly yet

Ideally, the Pyra should provide multiple Pulseaudio-Outputs: Bluetooth, Speaker, Headset, HDMI. All depending on whether there is something plugged in at the moment or not.

When connecting a device (e.g. plugging in headphones), the default output should automatically switch to that port for all existing streams. Rerouting them manually should be possible though. The Headset port has a switch so it recognizes if something is plugged in or not.

As far as I know, PulseAudio should be able to do this automatically. At least on my PC whenever I plugin a USB sound card, it automatically gives that a higher priority than the internal one.

Right now, PulseAudio only seems to list Stereo Duplex Output for me which seems to drive the vibra motor.

I guess we should work in multiple steps here:

1. Setup ALSA so we have these different streams with proper naming.
2. Setup PulseAudio to use these streams incl. naming.
3. Setup PulseAudio to be aware of the Headset switch.

Is there anyone with good knowledge of ALSA and/or PulseAudio here?