A simple React-based synthesizer built on the Web MIDI API and Web Audio API. Originally built for Raspberry Pi with a mini display, but compatible with any Chromium browser.

In the latest release, I've refactored the code to be way more readable and just generally better. Input has been separated to its own components (for easy updating), and re-renders have been optimized for better performance. The beginnings of computer keyboard input have been added but it's buggy as hell right now, so don't test it lol.

The Web MIDI API is not currently supported in Safari or Firefox. Because of this, the synth will only work in Chrome with a MIDI device connected.

You know the drill. Install project dependencies. There aren't a ton, pretty much just standard React stuff.

Run to start a localhost server with HTTPS enabled. This is currently required by most browsers to enable the MIDI API. Runs on https://localhost:3000.

This should also have live reload enabled, but it can be finicky so ya know, just refresh every now and then.

Set up is pretty easy, so at this point you should be jamming on your MIDI keyboard.

The MIDI mappings were originally set up for the Arturia Minilab Mk II but can easily be configured for other devices. All core settings can be accessed via src/midi-config.js. See comments in keyDownHandler and rangeHandler for instructions - basically, just console.log the input parameter to see your input data. It'll output an array with the following values [status code, note, velocity]. The note value is what you'll wanna plug in to midi-config.js. I'll probably add a MIDI configuration step in the frontend at some point but, but 🤷‍♂️.

Up next, I'll probably be adding computer keyboard support, mobile inputs, and more.