I've got a Behringer U-control USB device and I'm trying to learn pulseaudio / pacmd. The U-control has L/R input and L/R output (all RCA) plus digital, I don't need. I've worked out how to record from the inputs. I basically want to connect up the U-control to the laptop so that the laptop can send and receive audio.
How can I use pacmd to route the sound as follows:
(1) I'd like the L/R input of the U-control to be routed to my laptop speakers (or headphones), essentially monitoring the L/R input of the U-control.
(2) I'd like to route application/mic audio from the laptop to the L/R output of the U-control. I.e., I'd like to send sound from (A) one or more applications playing audio and/or (B) the mic from a headset.
How do I set up this routing using pacmd? (I've got pavucontrol, and can use that, though a fully self-contained solution in pacmd would be great.)
Thanks!
PS. I'm aware that Jack does some of this via a graphical interface. I've had a quick go at installing Jack on Ubuntu 20.04, but I didn't get very far. I also feels a little overkill for what I'd like to do - but if there's a simple guide to installing Jack and the kxstudio apps on Ubuntu 20.04, I'd be ok to try it - though worried about messing up my system.
PPS. Does anybody know if there's a graphical guide for translating a routing diagram into a set of pacmd commands?
