Alsa

• Manpage: man alsactl
• Config file: /var/lib/alsa/asound.state
• Devices: What Do ALSA Devices Like hw0,0 Mean?

List available soundcards:

aplay -l
cat /proc/asound/cards

Play on device:

aplay --device="hw:0,0" /usr/share/sounds/alsa/Front_Left.wav

• Speaker test

amixer

• amixer is the cli, alsamixer the ncurses frontent

Saves current mixer settings to /var/lib/alsa/asound.state, which will get restored on reboot:

sudo alsactl store

Show controls:

amixer scontrols