Web-MIDI wrapper for AKAI APC Mini Mk2

This package makes it simple to access your AKAI APC Mini Mk2's state in browser, using the web-midi API. In essence:

1. Get your hands on an AKAI APC Mini Mk2
2. Plug it in your device through USB (works on smartphones too!)
3. Open up a web browser running your website with the library's code (note: chromium on linux currently broken - use firefox instead)
4. Profit!

WIP Disclaimer - unstable API

This package is still very much work in progress, and the API is bound to change.

Install

npm install akai-apc-mini-mk2

Initialization

let mk2 = new APCMiniMk2();
mk2.connect({sysex: true}).then(() => {
    // run some commands right on startup (e.g. turning on the LEDs)
    console.log("Midi connected!");

    // set pad at cordinates [3,3] to blueish (you can use hex)
    mk2.pad33.color = "#123456";

    // set pad at coordinates [1,1] to white and pulse
    mk2.pad11.color = "#ff0000";
    mk2.pad11.pulse();

    // set button color and blink rates using AKAI's values
    mk2.buttons[7].color = [3, 15];

    // light up the volume button
    mk2.volumeButton.toggled = true;

    // access fader values via `.fader[0-8]`
    console.log("Current value of the lef-most fader:", mk2.fader0.value);
});

// the events will be broadcast globally, bubbling from the currently focused element - just like
// they
document.addEventListener("cc", evt => {
    console.log(evt.key, "changed to", evt.value, evt);
});

document.addEventListener("noteon", evt => {
    console.log("Button press", evt);
});

document.addEventListener("noteoff", evt => {
    console.log("Button release", evt);
});

Cleanup

Call .disconnect() in your cleanup routines - it will remove all system-level event listeners as well as any listeners you might have attached. Also, don't forget to call document.removeEventListener on any MIDI events

Events

Use document's addEventListener(eventType, callback) and removeEventListener(eventType, callback) to subscribe to the events. Events:

• cc - fired on slider/dial turn. Extra data in the event: {note, key, val, prevVal, button}
• noteon / noteoff - fired when any of the buttons are pressed and released. Extra data in the event: {note, key, button}
• sysex - when the device sends a sysex message. Generally won't be useful to you, but you can trigger a sysex message by pressing Shift+Drum on the APC Mk2.