dragora/archive/alsa-utils/rc.alsa

#! /bin/sh -
# /etc/rc.d/rc.alsa - Start ALSA (Advanced Linux Sound Architecture).
#
# Version:  (#)1.00  2009-01-04 (MAF)
#           (#)1.01  2010-06-21 (MAF)
#           (#)1.02  2010-12-09 (MAF)
#           (#)1.03  2011-03-31 (MAF)
#           (#)1.04  2017-07-27 (MAF)
#
# Written by Matias Fonzo for Dragora GNU/Linux-Libre,
# under the terms of the Apache License 2.0.

type alsactl > /dev/null 2>&1 || exit 2;
type amixer > /dev/null 2>&1 || exit 2;

if test -d /proc/asound
then
    if test -r /var/lib/alsa/asound.state
    then
        echo "Restoring ALSA mixer from /var/lib/alsa/asound.state ..."
        alsactl restore
    else
        echo "Setting values for the ALSA mixer ..."
        amixer set Master 90% unmute       > /dev/null 2>&1
        amixer set Front 80% unmute        > /dev/null 2>&1
        amixer set PCM 80% unmute          > /dev/null 2>&1
        amixer set Side 80% unmute         > /dev/null 2>&1
        amixer set CD 90% unmute           > /dev/null 2>&1
        amixer set Headphone unmute        > /dev/null 2>&1
        amixer set Mic 90% unmute          > /dev/null 2>&1
        amixer set 'Front Mic' 90% unmute  > /dev/null 2>&1
        alsactl store
    fi
fi