I have a TV card with its sound output connected to the CD-in of my mainboard's built-in sound card. There is also a USB sound device connected to my machine. Now I want to play the sound from the TV card via the USB sound output.
I tried the solutions proposed in How do I output my audio input? but they don't work for me. When I run those commands all I get is a lot of low frequency feedback that quickly adds up so that I need to terminate the command after a few seconds.
The reasons for this seems to be that the input source selected in
pavucontrol for my internal sound card is my microphone. However, the CD input does not show up in
pavucontrol, it only shows up in
Is there something that I am missing here? How can I play my CD-in from my internal sound card via my USB sound device?