PulseAudio output switcher

install.sh

#!/bin/bash

# Installs switchaudio.sh in current directory
# Tested on Ubuntu 20.04.1 LTS with GNOME 3.36.3 and X11
# Uninstall is manual: delete the script file and remove the shortcut from the keyboard shortcut preferences

set -e

curl -s https://gist.githubusercontent.com/domdomegg/ebef7b1808e1cca7879517c83a46ea9c/raw/8a408d85d0270841787186bacfa2d72c700aca61/switchaudiooutput.sh --output switchaudio.sh
chmod +x switchaudio.sh

shortcut="<Super>o"

current=$(gsettings get org.gnome.settings-daemon.plugins.media-keys custom-keybindings)

if ! [[ $current == *"'/org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/switchaudio/'"* ]]; then
    gsettings set org.gnome.settings-daemon.plugins.media-keys custom-keybindings "${current%]*}, '/org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/switchaudio/']"
fi
gsettings set org.gnome.settings-daemon.plugins.media-keys.custom-keybinding:/org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/switchaudio/ name 'Switch audio output device'
gsettings set org.gnome.settings-daemon.plugins.media-keys.custom-keybinding:/org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/switchaudio/ command "$(pwd)/switchaudio.sh"
gsettings set org.gnome.settings-daemon.plugins.media-keys.custom-keybinding:/org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/switchaudio/ binding $shortcut

echo "Installation complete"

switchaudiooutput.sh

#!/bin/bash

# Adapted from https://ubuntuforums.org/showthread.php?t=1370383

declare -i sinks=(`pacmd list-sinks | sed -n -e 's/\**[[:space:]]index:[[:space:]]\([[:digit:]]\)/\1/p'`)
declare -i sinks_count=${#sinks[*]}
declare -i active_sink_index=`pacmd list-sinks | sed -n -e 's/\*[[:space:]]index:[[:space:]]\([[:digit:]]\)/\1/p'`
declare -i next_sink_index=${sinks[0]}

#find the next sink (not always the next index number)
declare -i ord=0
while [ $ord -lt $sinks_count ]; do
    echo ${sinks[$ord]}
    if [ ${sinks[$ord]} -gt $active_sink_index ] ; then
        next_sink_index=${sinks[$ord]}
        break
    fi
    let ord++
done

echo $next_sink_index

#move all inputs to the new sink
for app in $(pacmd list-sink-inputs | sed -n -e 's/index:[[:space:]]\([[:digit:]]\)/\1/p'); do
    pacmd "move-sink-input $app $next_sink_index"
    echo "hi"
done

#change the default sink
pacmd "set-default-sink ${next_sink_index}"

#display notification
declare -i ndx=0
pacmd list-sinks | sed -n -e 's/device.description[[:space:]]=[[:space:]]"\(.*\)"/\1/p' | while read line; do
    if [ $(( $ord % $sinks_count )) -eq $ndx ] ; then
        line=$(echo ${line% Analog Stereo} | tr '[:upper:]' '[:lower:]')
        line=${line//hdmi/HDMI}
        notify-send -i notification-audio-volume-high --hint=string:x-canonical-private-synchronous: "Sound output switched" "Now using $line"
        exit
    fi
    let ndx++
done;

a simple adaption for pactl (for use with pipewire)

#!/bin/bash

default_sink=$(pactl get-default-sink)
declare -i sink_count=$(pactl list sinks short | awk '{print $2}' | wc -l)
declare -i active_sink_index=$(pactl list sinks short | awk '{print $2}' | grep -n $default_sink | cut -f1 -d:)
declare -i next_sink_index=1

if [ $active_sink_index -ne $sink_count ] ; then
   next_sink_index=active_sink_index+1
fi

next_sink=$(pactl list sinks short | awk '{print $2}' | sed "${next_sink_index}q;d")

#change the default sink
pactl set-default-sink $next_sink

#move all inputs to the new sink
for app in $(pactl list sink-inputs short | cut -f1 -d:);
do
   pactl move-sink-input $app $next_sink
done