I recently upgraded my Pi 400 to the latest Os version that now uses Pulseaudio by default. I have my Pi connected to an AVR (Harman Kardon 151S) that is connected to a 5.1 setup of loudspeakers.
speaker-test -c6 -D hw:0 correctly plays sound from each loudspeaker including the subwoofer.
However, when I try to play a test file in Kodi, MPV or VLC, the surround channels are played trough the front loudspeakers and the subwoofer is silent.
I suspect this is because pulseaudio wrongly offers just a Digital Stereo output (a portion of
profiles: output:digital-stereo: Digital Stereo Output (priority 5100, available: unknown) off: Off (priority 0, available: unknown)
How can I make it use a 5.1 profile?