

I have yet to read this, but. But the first part is like the internals of systemd, you won’t immediately need it.
If you want to make use of systemd, you can skip directly to where it explains unit files. You’ll soon see just how much it can do for you
It’s digital audio, not analog, I doubt the GPU could ever be an issue. I suspect either there was a bug in the interaction between pipewire and the drivers (on one side or the other), or an update changed the default sampling rate of pipewire