ZOOM Livetrak L-20 webinterface / MIDI server

With this project, I'm reverse engeneering the midi protocol that the L-20 talks using the BLE-1.

Project status

• python server is connecting to BLE characteristic, converting the MIDI data

• currently supported MIDI commands:

  • track volume for track 1-19/20 on all 7 groups (master and 6 headphone mixes)
  • toggle mute of a track
  • toggle solo of a track
  • master fader volume and mute
  • EFX tracks volume, mute and solo
  • rec/play buttons
  • initial loading of track info and volume, solo, mute from device in one bulk sysex message
  • setting track colors (8 colors available like on the iPad App)
  • change track names
  • setting/receiving group volumes (headphone mixes), Note that changs are not persisted and are not saved in a Scene!

• jquery based client similar to the iPad App:

• missing funtionality:

  • FIX server startup on Linux/RaspPi
  • FX channel parameters are missing yet
  • Track settings like Send FX1/FX2, PAN, EQ
  • Global EQ
  • Recorder, Project name, folder, Overdub and tempo
  • Level meters and signal indicators (not sent via MIDI?!)

Installation

Use the package manager pip to install the following libraries:

• websockets
• bleak
• mido

pip3 install bleak
pip3 install mido
pip3 install websockets

Start the server

cd server && python3 PyL20_osx.py -w 8001

This will start the server including a basic http server on port 8001 to connect to.

(Note: Currently for Linux/Windows there must be pairing enabled in the script)

JQuery client

For the client there is a webserver required. You can use the included python webserver (from the example above) or a dedicated one.

cd jquery_client
python3 ../tools/webserver.py

Now you can use the client by opening http://localhost:8001 in your browser.

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.