#!/bin/sh
# check auto-mute state
amixer -c 1 sget "Auto-Mute Mode" | grep "Item0: 'Disabled'"
# $? is 0 if auto-mute is disabled
# $? is 1 if auto-mute is enabled
if [ "$?" -eq "0" ]; then
    amixer -c 1 sset "Auto-Mute Mode" Enabled
else
    amixer -c 1 sset "Auto-Mute Mode" Disabled
fi