Script for switching between 2 audio sinks

switch_audio_sink.sh

#!/bin/bash
set -euo pipefail # strict mode

currentSink() { pacmd list-sinks | awk '{if($1=="*"){print $3;}}'; }
inactiveSink() { pacmd list-sinks | awk '{if($1=="index:"){print $2;}}'; }
sinkInputs() { pacmd list-sink-inputs | awk '{if($1=="index:")print $2}'; }

current_sink="$(eval currentSink)"
inactive_sink="$(eval inactiveSink)"
sink_inputs="$(eval sinkInputs)"
let next_sink=current_sink+1

if [[ $inactive_sink != *"$next_sink"* ]]; then
    next_sink=0
fi

# set the inactive sink as default for new streams
pacmd set-default-sink "$next_sink"

while read -r input; do
    # move existing stream to inactive sink
    pacmd move-sink-input "$input" "$next_sink"
done <<< "$sink_inputs"