PulseAudio Recording Script

#!/bin/bash
# PulseAudio Recording Script
#
# Record sound output from PulseAudio
# and convert it to something useful using sox
#
# Dependencies: pulseaudio, pacat (parec), sox
#
# Author: Michael Koch (Emkay443) (m<DOT>koch<AT>emkay443<DOT>de)
# Version: 2013-08-31
# License: GNU General Public License v3 (http://www.gnu.de/documents/gpl-3.0.en.html)

###################
## CONFIGURATION ##
###################

# Sample rate in Hz
sample_rate=44000

# Number of bits (8/16/24)
bits=16

# Number of channels
channels=2

# Pulseaudio monitor device
# Use "pacmd list | grep .monitor" and change the following value
# according to the output of the above command (it has too look like in this example!)
pulse_monitor_device="alsa_output.pci-0000_00_1b.0.analog-stereo.monitor"


#########################################################################################
# WARNING: You should be careful when changing any code below. Modify at your own risk! #
#########################################################################################

##################
## MAIN PROGRAM ##
##################
if [ ! -z $1 ]; then
    echo "Recording Sound to $1"
    echo "Stop sound recording with CTRL-C"
    parec -d $pulse_monitor_device | sox -t raw -r $sample_rate -e signed-integer -L -b $bits -c $channels - $1
else
    echo "This program requires one parameter - the file path of the converted file"
    exit 1
fi

exit 0