Pulseaudio
Usage
Play (paplay can't play mp3):
paplay ~/Audio/examples/Thriller.ogg
paplay /usr/share/sounds/alsa/Front_Center.wav
List all configured pulseaudio components (including soundcards):
pactl list
Configure volume:
pactl set-sink-volume 0 +5%
pactl set-sink-volume 0 -5%
pactl set-sink-mute 0 toggle
pactl set-source-mute 1 toggle
Issues
Device/sink suspended
https://unix.stackexchange.com/a/171925
Disable module-suspend-on-idle in either .config/pulse/default.pa or
/etc/pulse/default.pa.
Troubleshooting
https://wiki.archlinux.org/index.php/PulseAudio/Troubleshooting
Debug output:
systemctl --user stop pulseaudio.socket pulseaudio.service
pulseaudio -v