On Thu, Mar 24, 2022 at 2:35 AM Peter Humphrey <pe...@prh.myzen.co.uk> wrote: <SNIP> > > System Settings -> Audio > > > > should show your playback devices. Possibly the setting got switched to > > an HDMI output on your video card or to the chipset sound device > > and isn't USB at the moment? > > As I said, I do see all three sound devices there. I can switch them each on > and off, and assign the kind of output I want from them. I do that, and using > the Test buttons I hear nothing. > > -- > Regards, > Peter.
Sorry, if that was actually in the original post I just didn't understand. Jack's response to you was more complete and duplicates my thinking about how to approach debugging. To answer one of your earlier questions, but I doubt it applies in the case of a simple USB sound device, it is possible for other programs to program certain sound cards in ways that Alsa & pulseaudio would not know about. I've used an RME HDSP9652 studio sound card for about 15 years. It has 52 inputs, 52 outputs and lots of internal hardware routing that general Linux sound doesn't know about and cannot control. It's configured using two apps (hdspconf and hdspmixer) to do a lot of special things that are recording studio specific. At times I've misused these programs and had a lot of mysterious problems. That said I think it's very unlikely anything like this applies in your case, but technically it's possible. Good luck getting this solved. Weird stuff. Mark
