MIDI Messages

messages.js

// See chart at http://www.midi.org/techspecs/midimessages.php

function handleMIDIMessage(message)
{
    var status   = message.data[0];
    var note     = message.data[1];
    var velocity = message.data[2];

    var type    = status >> 4;
    var channel = status & 0xf;

    if (type == 0x8) {
        handleNoteOff(channel, note);
    } else if (type == 0x9) {
        handleNoteOn(channel, note, velocity);
    } else if (type == 0xa) {
        handleAftertouch(channel, note, velocity);
    } else {
        // ... handle other types here
    }
}