bobby@bobby-ubuntu:/media/mystuff/new pics/vid 2$  speaker-test -c1 -D10to20 -twav

speaker-test 1.0.13

Playback device is 10to20
Stream parameters are 48000Hz, S16_LE, 1 channels
WAV file(s)
ALSA lib pcm.c:2143:(snd_pcm_open_noupdate) Unknown PCM 10to20
Playback open error: -2,No such file or directory