There is no 5.1 Profile in pavuctl to be selected, only Duplex Stereo.
If I go to alsamixer and then select the Starship/Matisse HD device I can see that it is configured to have 2ch, i can then change that to 6ch but that still doesn’t make another profile available in pavuctl.
Under Arch after a reboot for some magic reason 5.1 Profile appeared after that but not this time. And as written, I absolutely had no clue why it suddenly worked.
Question:
How to properly configure the different layers of the pipewire/alsa sound architecture to enable a 5.1 Surround sound profile?
Why, cause when I change the number of channels via alsamixer and then restart wireplumber I get a completely different node with different name and device id and that one already has the settings set correctly.
But the original node can not be changed to 6 channels via wireplumber (I assume thats also the reason, why pavuctl isn’t able to select any 5.1 profile cause the node has only 2 channels)
How can I do what I do can do with alsamixer (changing channels to 6) on bootup before wireplumber even starts up?