Audio

Alsa:

# amixer scontrols
# amixer set Master playback 80% unmute
# amixer set Speaker playback 100% unmute
# amixer set Headphone playback 100% unmute

OSX:

# highest osascript -e "set Volume 7"
# lowest osascript -e "set Volume 1"
# middle osascript -e "set Volume 3.5"