I loaded the loop-sender code in some weeks back but now when it is time to look into it, instead of hw:CARD=Loopback,DEV=0 expressions , the window of selections shows only Loopback PCM (hw:10.0) through
Loopback PCM (hw:11.1). Are these convertible some way or did I take a wrong turn on the loop sender? (it seemed to accept the test commands OK and showed loopback channels at some point.)
You may have changed audio systems inadvertently. Each system lists names a little differently. But I could be wrong.