Select and create combined sink node with Pipewire and set it as default Pulseaudio sink (output)

create-combined-sink.sh

#!/bin/bash
set -euo pipefail

list_sinks() {
	pw-cli list-objects Node | grep -P '^\s+id |^\s+node\.name|^\s+media\.class = "Audio/Sink"' | grep 'media\.class' -B 2 --no-group-separator | paste -sd'  \n' | sed 's/^\s*id [0-9]*, type .*node\.name = "\([^"]*\)".*/\1/' | (grep -vP "^($1)$" || true)
}

pactl unload-module module-combine-sink 2> /dev/null

selected_names_regex=''
selected_names=""
while true; do
	selected=$((echo && list_sinks "$selected_names_regex") | fzf --layout=reverse)
	if [ -z "$selected" ]; then
		break
	fi
	selected_names_regex="$selected_names_regex|$selected"
	selected_names="$selected_names,$selected"
done

if [ ! -z "$selected_names" ]; then
	pactl load-module module-combine-sink sink_name='combined' slaves="$selected_names"
	pactl set-default-sink 'combined'
fi