A startup script that sets up a zita-njbridge source and transmits a sine wave using SuperCollider and Tmux

njstart

#!/bin/bash
#
# This script makes it easy to setup a source in a networked audio connection 
# It uses the 'zita-j2n' (jack to network) command to send audio to the network 
# (to be received using 'zita-n2j' on the other end)
#
# Usage
# njstart <target_ip> <target_port> <scfile (optional)>
# Dependencies: jack, zita-njbridge, SuperCollider, tmux
#
session="network-audio"

if [ -z $1 ]; then
	echo "No arguments supplied. Exiting..."
	echo "
	Usage
	njstart <target_ip> <target_port> <scfile (optional)>
	"
else
	target_ip=$1
	target_port=$2

	if [ -z $3 ]; then
		scfile="$HOME/test.scd"
	else
		scfile="$3"
	fi

	# set up tmux
	tmux start-server
	tmux new-session -d -s $session

	# Start jack
	tmux new-window -t $session:1 -n jack 
	tmux send-keys -t $session:1 "/usr/bin/jackd -dalsa -dhw:1 -r48000 -p512 -n2" Enter 

	# Zita
	tmux new-window -t $session:2 -n zita 
	tmux send-keys -t $session:2 "sleep 5; zita-j2n "$target_ip" "$target_port"" Enter 

	# Connect output of SuperCollider to the input of the zita-network connection
	tmux new-window -t $session:3 -n connections 
	tmux send-keys -t $session:3 "sleep 6; jack_connect SuperCollider:out_1 zita-j2n:in_1 && jack_connect SuperCollider:out_2 zita-j2n:in_2 && echo 'connected supercollider to zita-j2n successfully'" Enter 

	# Run SuperCollider file using sclang
	# Create a test file if there isn't one on the system
	if [ ! -f "$scfile" ]; then
		scfile="$HOME/test.scd"

		echo "SuperCollider file $scfile does not exist. 
		Creating a simple sine wave file in $scfile instead"
		
		# Make sc file
		echo "
		// Boot server and play stereo sine wave
		s.waitForBoot{
		play{
		SinOsc.ar([440, 441], mul: 0.5).poll(1)
	}
	}" > "$HOME/test.scd"

	fi

	tmux new-window -t $session:4 -n supercollider 
	tmux send-keys -t $session:4 "sclang $scfile" Enter 

	# Open the tmux session
	tmux attach-session -d -t $session
fi