# alsa config, ~/.asoundrc (or /etc/asound.conf ?)
# See list of cards with: cat /proc/asound/cards
# Number 1 for me is USB headset and when it's unplugged, the integrated
# soundcard gets used instead. Changing to headset requires restarting the
# app (as opposed to `killall pulseaudio` and restarting all apps ;))
defaults.pcm.card 1
defaults.ctl.card 1