Pulseaudio: switch all apps playing sound to play on a specific device

paswitch.sh

#!/bin/sh
# switch all apps playing sound to a given device. 
# usage: paswitch.sh [HEADPHONES|SPEAKERS] (really meant to be bound a key shortcut)

# these are the sink names of the devices we want to use
HEADPHONES="alsa_output.usb-FiiO_DigiHug_USB_Audio-01-Audio.analog-stereo"
SPEAKERS="alsa_output.pci-0000_00_1b.0.analog-stereo"

# get a list of ID's of everything playing sound
INPUTS=`pacmd list-sink-inputs | grep index | cut -d ':' -f2 | sed 's/^ *//g'`

if [ -z "$INPUTS" ]; then
	# nothing is playing
	exit 
fi

case $1 in
	SPEAKERS)
		INPUT=$SPEAKERS;;
	HEADPHONES)
		INPUT=$HEADPHONES;;
esac

# get the index of the desired sink
INDEX_LINE=`echo $(pacmd list-sinks | nl | grep "$INPUT" | awk '{print$1}') - 1 | bc`
INDEX=`pacmd list-sinks | nl | grep "^ *$INDEX_LINE" | head -n 1 | grep -oE "[0-9]+$"`

# change every input to use the desired sink
for i in `echo "$INPUTS" | sed 's/ /\n/g'`; do
	pacmd move-sink-input $i $INDEX
done