# To find your card
# aplay -l
# speaker-test -D plughw:CARD=PCH -l 1 -t sine

# defaults.pcm.!card PCH
# defaults.pcm.!device 0
# defaults.pcm.!ctl PCH

# defaults.pcm.card 1
# defaults.ctl.card 1

defaults.pcm.card plughw:PCH
defaults.ctl.card plughw:PCH