my_loop_line-in

#!/bin/bash
LOOPSOURCE='alsa_input.pci-0000_00_14.2.analog-stereo'
LOADED=$(pactl list modules | grep -B2 $LOOPSOURCE | head -n1 | cut -d\# -f2)
if [[ ! -z "$LOADED" && $LOADED -ge 0 ]]
then
  pactl unload-module $LOADED
  echo Unloaded $LOOPSOURCE loopback, PA module number $LOADED
else
  pactl load-module module-loopback source=$LOOPSOURCE
  echo Loaded $LOOPSOURCE loopback
fi