bobby@bobby-ubuntu:~$ 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_route.c:1107:(_snd_pcm_route_open) Invalid type for ttable
Playback open error: -22,Invalid argument