>> Is there some sort of volume control and device selector
>> I need to install?
>
> Try mixerctl (included with NetBSD). Maybe audioctl manpage should add a
sentence to point to the other manpage (instead of just having it in SEE
ALSO).
>
> My menu has:
>
> Very Loud	mixerctl -w outputs.master=248,248
> Louder		mixerctl -w outputs.master=200,200
> Loud		mixerctl -w outputs.master=160,160
> Normal		mixerctl -w outputs.master=120,120
> Quiet		mixerctl -w outputs.master=72,72
>

BTW I changed the default links (audio audioctl mixer sound) in /dev to
point to the respective *1 devices.

No joy:
# mixerctl -a
inputs.mic=220,220
inputs.mic.mute=off
inputs.cd=220,220
inputs.cd.mute=off
inputs.dac=220,220
inputs.dac.mute=off
record.record=220,220
record.record.source=mic
monitor.monitor=0
monitor.monitor.mute=on
# mixerctl -w outputs.master=248,248
mixerctl: field outputs.master does not exist