Linux audio work environment - supercollider in emacs routed to REAPER via jackd

daw.sh

#! /usr/bin/env bash

set -e
set -m
set +x

output_device="PCH"

if cat /proc/asound/cards | grep -q Scarlett; then
    output_device="USB"
fi

jackd -R -d alsa -d "hw:${output_device}" -p 512 &
jackpid=$!

jack_wait -w
a2jmidid -e &

gtk-launch cockos-reaper.desktop > /dev/null 2>&1 &

emacsclient -e "(sclang-start)" > /dev/null 2>&1  &

until lsof -i | grep -q scsynth; do
    echo "Waiting for sc to boot..."
    sleep 0.5
done

until jack_lsp | grep -q REAPER:in20; do
    echo "Waiting for reaper to allocate input channels..."
    sleep 0.5
done

echo Connecting scsynth to reaper...

for i in {1..5}; do
    jack_connect "SuperCollider:out_${i}" "REAPER:in${i}"
done

echo done

# disown emacsclient
disown %3

# disown reaper
disown %2

function cleanup() {
    emacsclient -e "(sclang-stop)" > /dev/null 2>&1 &
    killall reaper
    killall jackd
}

trap cleanup SIGINT

# foreground jackd
wait $jackpid