Launching gnome-volume-control from terminal, and clicking "Test Speakers" results in:
$ gnome-volume-control ** ERROR:gvc-speaker-test.c:390:get_channel_map_for_card: assertion failed: (stream) Aborted $
Launching gnome-volume- control from terminal, and clicking "Test Speakers" results in:
$ gnome-volume- control speaker- test.c: 390:get_ channel_ map_for_ card: assertion failed: (stream)
**
ERROR:gvc-
Aborted
$