A script to stream audio from any Pulseadio-enabled system to an Android phone over the internet, in my case to emulate a bluetooth adapter.

pulseaudio-network-share.sh

#!/usr/bin/env bash

# A script to stream audio from any Pulseadio-enabled system to an Android phone over the internet, in my case to emulate a bluetooth adapter.
# The Android app "Simple Protocol Player" can be used to connect to the stream opened by this script: https://github.com/kaytat/SimpleProtocolPlayer.
# Based off of this post: https://superuser.com/a/750324. Thanks!

# Use `pactl list | grep "Monitor Source"` to find the appropriate output source.
sourceName="alsa_output.pci-0000_00_1f.3.analog-stereo.monitor"

# Both must match with what is configured in the Simple Protocol Player app.
port="1285"
rate="48000"

set -euo pipefail

stop() {
	local module="$1"
	echo "unloading module '${module}'" >&2
	pactl unload-module "${module}"
}

start() {
	local module
	module="$(pactl list | grep tcp -B1 | grep M | sed 's/[^0-9]//g' || true)"
	if [ -n "${module}" ]; then
		echo "module was already loaded, restarting" >&2
		stop "${module}"
	fi

	echo "starting TCP module for source '${sourceName}' on port ${port}" >&2
	module="$(pactl load-module module-simple-protocol-tcp format=s16le channels=2 record=true rate="${rate}" source="${sourceName}" port="${port}")"
	# shellcheck disable=SC2064
	trap "stop ${module}" EXIT # We want to expand $module now since locals wont be available in the trap subshell.

	echo "press enter to stop" >&2
	read -r
}

start