John Dey wrote: > Before I try speaker-test however, I want to understand what is going > on. Any error messages from speaker-test would help me to understand what is going on. > When I start jack with qjackctl, the connect tab shows payback_1 > and playback_2. I assume this is stereo. Yes. > When I select the setup tab and change the Output Channels to 4 (or 8), > qjackctl won't start. Is that with the USB device or with another sound card? Regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel