#!/bin/bash
###########################################
# Copyright (C) 2005 Patrick A. Read
#
# This script toggles muting the playback
# of the Master volume device in alsamixer.
# Usage: mute (no arguments) - the mute
# state is TOGGLED by successively running
# this script.  The volume level of the
# Master control is saved to a temp file
# (see script for details) so that when mute
# is run again, the prior volume level is 
# restored.  If this temp file does not exist 
# when the user unmutes using this script, 
# then I found a default value of 22 (on a
# 0-31 scale) to be a comfortable level.
# Feel free to vary this to your liking.
###########################################
declare -r TEMPVOLFILE="/tmp/kde-${USER}/volume.tmp"
declare -r CURRENTVOLUME=$(amixer get Master | grep \
 'Front Left:' | cut -d' ' -f6)
declare -i NEWVOLUME

if [ "${CURRENTVOLUME}" == "0" ]
then
if [ -f ${TEMPVOLFILE} ]
then
NEWVOLUME=$(cat ${TEMPVOLFILE})
else
NEWVOLUME=22
fi
amixer set Master ${NEWVOLUME}
else
echo ${CURRENTVOLUME} > ${TEMPVOLFILE}
amixer set Master 0
fi
exit 0
###########################################
# end of mute script
###########################################