/usr/local/share/scrotwm/audioout.sh

.scrotwm.conf

# My scrotwm config

# Programs
program[swap_audio]	= /usr/local/share/scrotwm/audioout.sh

# Key Bindings
bind[swap_audio]	= MOD+Shift+a

audioout.sh

#!/bin/sh
#
# audioout.sh - Ahmad Zulkarnain 08/09/11
# Script to alternate between audio master output and phone output.
# Will be used by scrotwm. Copy to /usr/local/share/scrotwm/
# and alter ~/.scrotwm.conf accordingly.

# Variables for audio status
master=$(mixerctl | grep master.mute | sed s/.*=//)
phout=$(mixerctl | grep phone.mute | sed s/.*=//)

# Program starts
if [[ $master == 'on' ]];
	then
		mixerctl outputs.master.mute=off;
		mixerctl outputs.hp.mute=on;
elif [[ $phout == 'on' ]];
	then
		mixerctl outputs.master.mute=on;
		mixerctl outputs.hp.mute=off;
else
	mixerctl outputs.master.mute=off;
	mixerctl outputs.hp.mute=on;
fi