Whenever I try to run speaker-test -D default -c 2 while I have youtube playing on chrome it says this:
gek@gek-pc:~$ speaker-test -D default
speaker-test 1.1.7
Playback device is default
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
ALSA lib pcm_dmix.c:1099:(snd_pcm_dmix_open) unable to open slave
Playback open error: -16,Device or resource busy
Also, SOME (not all) software will just refuse to run sound if chrome is open, in particular kega fusion.
This annoys the hell out of me
Since noone else has that problem, the probability of kega fusion being the culprit, is high.