I installed NetBSD/amd64 10.1 on an Intel NUC. I have headphones
plugged into the front panel. Also, my HDMI monitor has built-in
speakers. When i play audio in palemoon, the audio comes from my
monitor. The `audiocfg list` command shows that the default is the
Realtek chipset, which corresponds to my headphones, not the monitor.
`autiocfg test 0` produces silence from the headphones.
`audiocfg test 1` produces audio from the monitor.
Below are the output of audiocfg, mixerctl, and excerpts from
dmesg.