alsa-utils

＃　alsa-utils

examples:
# ./aplay -Dhw:3,0 file.wav

# ./aplay -Dhw:1 file.wav

# ./arecord -Dhw:3 -d 6 -f cd -t wav record.wav




# amixer cset name="SPKL Playback Volume" 250
or amixer -q cset name="SPKL Playback Volume" 250


amixer cget name="SPKL Playback Volume"