deloptes wrote on 10/27/2016 12:14 PM:
It looks reasonable. What you can do, since you have pulse installed, you
could run pavucontrol and setup the input devices properly. Perhaps your
problem is visible there - muted/default etc. I usually start recording and
run pavucontrol, navigate to "Input Devices" and look at the indicator - it
should show the level of input, play with those until it works :)
Excellent!
pavucontrol wasn't installed, but I installed it and played with the Input
Devices tab.
And that's when I discovered that I should have been recording from "Aux"
rather than from "Line".
When I configured ALSA to record from Aux on hw:0,0, it worked perfectly.
Thank you so much for suggesting pavucontrol. FWIW, I had been thinking all
along that this problem would be so much easier to solve if only there were a
way to monitor what was happening in real time; as far as I can tell, ALSA
itself doesn't provide any way to do that :-(
Thank you again.