The current direction is a PipeWire-based system centered around Bitwig Studio. Older QJackCtl patchbay files, Jack Rack presets, and JACK startup/recording scripts are being removed from the working tree, but the migration is recorded below so the old setup can still be recovered from Git history.

Current Contents

scripts/set-pipewire-latency.sh - helper for checking, forcing, and clearing PipeWire graph quantum/rate metadata.
sounds.txt - notes about useful electric piano, piano, brass, pad, organ, string, mallet, and synth sounds.
soundfounts/ - archived SoundFont resources.
yoshimi-patches/ - archived Yoshimi banks and patch collections.

PipeWire And Bitwig Studio

The new setup should prefer PipeWire as the shared audio graph instead of manually starting JACK through QJackCtl profiles and wiring sessions with QJackCtl patchbays.

For standalone low-latency work outside the DAW, use:

scripts/set-pipewire-latency.sh status
scripts/set-pipewire-latency.sh on 128 48000
scripts/set-pipewire-latency.sh off

The script writes PipeWire settings metadata with pw-metadata -n settings. on defaults to a quantum of 128 at 48000 Hz, which is about 2.7 ms per block. off clears clock.force-quantum and clock.force-rate so PipeWire can return to normal behavior.

This override is not expected to be necessary when working in Bitwig Studio. Bitwig is the DAW for the new workflow, so latency should normally be handled inside that DAW/session rather than forced globally through this helper.

Legacy JACK Migration Notes

The mainline branch in this checkout is named main. At the time these legacy files were staged for deletion, the current main / origin/main commit was:

ee169b0e013496b177195a6719295b40f9c932dd

That commit is the last mainline commit where the old QJackCtl, Jack Rack, and script-based JACK workflow is available. To inspect one of the removed files:

git show ee169b0e013496b177195a6719295b40f9c932dd:<path>

Files Staged For Deletion

jack-rack-presets/home/fender-jazz
jack-rack-presets/home/headphones
jack-rack-presets/home/sr505zw
jack-rack-presets/newlife/bass2
jack-rack-presets/newlife/drums
jack-rack-presets/newlife/headphones
jack-rack-presets/newlife/headphones2
jack-rack-presets/newlife/m48-mix
jack-rack-presets/newlife/yamaha-trb
jack-rack-presets/onboard/headphones
jack-rack-presets/onboard/sg200
jack-rack-presets/onboard/sr505zw
jack-rack-presets/onboard/yamaha-trb
qjackctl-routing-settings/FastTrack-Practice.xml
qjackctl-routing-settings/K6-Bass+System.xml
qjackctl-routing-settings/church-eq-bass-with-synth.xml
qjackctl-routing-settings/church-eq-mix-ears-only.xml
qjackctl-routing-settings/church-eq-mix-splitchannel-with-headphone-mix.xml
qjackctl-routing-settings/church-eq-mix-splitchannel.xml
qjackctl-routing-settings/church-eq-mix.xml
qjackctl-routing-settings/church-eq-two-bass-setup.xml
qjackctl-routing-settings/keyboard-qsynth.xml
qjackctl-routing-settings/maudio-fasttrack.xml
qjackctl-routing-settings/onboard.xml
qjackctl-routing-settings/studio.xml
scripts/nl-prepare-raw-files-synth.sh
scripts/nl-prepare-raw-files.sh
scripts/nl-rec
scripts/nl-rec-1
scripts/nl-rec-service
scripts/nl-rec-service-synth
scripts/nl-split-rec
scripts/start-church-session
scripts/start-church-session-bass-with-synth
scripts/start-church-session-two-bassists
scripts/start-home-session
scripts/start-onboard-session

Jack Rack Presets

The jack-rack-presets/ files were gzip-compressed Jack Rack XML presets at 48 kHz. They store LADSPA plugin IDs, enabled/disabled state, wet/dry settings, and raw control values.

home/ contained home practice chains for Fender Jazz bass, SR505ZW bass, and headphones.
onboard/ contained onboard audio chains for headphones, SG200, SR505ZW, and Yamaha TRB bass.
newlife/ contained New Life church chains for Yamaha TRB bass, a second bass, M48 mix, drums, and one or two headphone mixes.

The bass presets were mono chains for instrument tone/level processing. The headphone, M48, and drum presets were stereo or monitor-oriented chains used by the old patchbay and session launcher scripts.

QJackCtl Patchbays

The qjackctl-routing-settings/ XML files were QJackCtl patchbay definitions. They described JACK and MIDI clients, expected ports, and cables to restore session routing.

FastTrack-Practice.xml routed a FastTrack practice setup with bass through Jack Rack, Hydrogen, QSynth, PulseAudio JACK sink/source, and meters.
K6-Bass+System.xml routed a Komplete Audio 6 setup with Jack Rack, PulseAudio JACK, zita-at1, bridge meters, and MIDI control.
maudio-fasttrack.xml routed FastTrack bass/headphones/QSynth practice use, including zita-at1, meters, and a JACK-to-ALSA MIDI bridge.
keyboard-qsynth.xml connected Oxygen 61 and jack-keyboard MIDI into QSynth, with system and PulseAudio JACK audio routing.
onboard.xml connected QSynth, MDA ePiano, jack-keyboard, Alesis Recital, LPK25, a2j/ALSA MIDI, PulseAudio JACK, and headphone routing.
studio.xml routed a studio setup with bass, mic, MDA ePiano, Alesis Recital, LPK25, meter ports, and system outputs.
church-eq-mix.xml, church-eq-mix-ears-only.xml, church-eq-mix-splitchannel.xml, church-eq-mix-splitchannel-with-headphone-mix.xml, church-eq-two-bass-setup.xml, and church-eq-bass-with-synth.xml described New Life church routings for bass, M48 mix/drum feeds, monitors, meters, tuner input, second-bass variants, and synth/MDA ePiano variants.

Legacy Scripts

The removed scripts were tightly coupled to JACK client names, QJackCtl profiles, Jack Rack session names, and specific capture/playback ports.

start-home-session started QJackCtl profile Onboard48K, loaded home bass and headphone Jack Rack presets, and started j2amidi_bridge.
start-onboard-session started QJackCtl profile Onboard48K and loaded onboard Yamaha TRB and headphone Jack Rack presets.
start-church-session started QJackCtl profile Church48K, loaded New Life bass, M48 mix, drums, and headphone Jack Rack presets, started meterbridge, and ran devilspie.
start-church-session-bass-with-synth extended the church session with yoshimi, a2jmidid, and separate bass/M48 meter bridges.
start-church-session-two-bassists extended the church session with second bass and second headphone Jack Rack chains plus separate meters.
nl-rec recorded three JACK capture ports with jack_capture.
nl-rec-1 recorded the sermon channel from system:capture_3.
nl-rec-service recorded worship, sermon, and altar files from the church capture ports.
nl-rec-service-synth recorded the same service files while also capturing Yoshimi left/right outputs.
nl-split-rec split one .wavex file into M48, drums, and bass WAV files.
nl-prepare-raw-files.sh split worship.wavex and altar.wavex into M48, drums, and bass WAV files with ffmpeg.
nl-prepare-raw-files-synth.sh did the same split while also extracting synth left/right WAV files.

These files document the old JACK-era workflow but are no longer the active direction for this repository.