zap 11~% speaker-test -c2 -Ddefault -twav
speaker-test 1.0.15
Playback device is default
Stream parameters are 48000Hz, S16_LE, 2 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 1 to 1048576
Period size range from 0 to 206158431
Using max buffer size 1048576
Periods = 4
was set period_size = 262144
was set buffer_size = 1048576
*** PULSEAUDIO: Unable to create stream.
Unable to set hw params for playback: Input/output error
Setting of hwparams failed: Input/output error
speaker-test: pcm_pulse.c:115: pulse_stop: Assertion `pcm->stream' failed.
zsh: abort (core dumped) speaker-test -c2 -Ddefault -twav
zap 1341~%