If you have pulse, use pulse.
which pulseaudio. No output means you need to use alsa (below).
pactl set sink @DEFAULT_SINK@ +5%
Find working outputs:
Surround.5 seems best.
Find what Sound settings exist
Change a Sound setting
amixer set Master 5%-
pulseaudio -k && sudo alsa force-reload
Toggle, mute, increase or decrase audio:
amixer sset Master toggle
amixer sset Master mute
amixer sset Master 5%+
amixer sset Master 5%-
Finicky Sound Cards
F6 to see available Sound cards.
If you find a Sound card called ‘PinePhone’, then you can select an audio source there, and adjust with:
amixer -c PinePhone set ‘Headphone’ 50%