midi.mjs

/*
https://developer.mozilla.org/en-US/docs/Web/API/Web_MIDI_API
https://www.midi.org/specifications/midi-reference-tables/expanded-midi-1-0-messages-list-status-bytes
https://github.com/cwilso/midi-synth/blob/master/js/midi.js
https://webmidijs.org/docs/
https://en.wikipedia.org/wiki/General_MIDI
*/

// https://musescore.org/sites/musescore.org/files/General%20MIDI%20Standard%20Percussion%20Set%20Key%20Map.pdf
// https://usermanuals.finalemusic.com/SongWriter2012Win/Content/PercussionMaps.htm
// https://lilypond.org/doc/v2.23/Documentation/notation/percussion-notes

export const JWC = {
    'bda': '35',
    'bd': '35', //
    'sn': '38',
    'sne': '38', // FAKE
    'toml': '41',
    'hh': '42', // should be closed does not sound like it
    'hho': '42', // should be closed does not sound like it
    'hhc': '44', //
    'toml': '45',
    'hho': '46',
    'tommh': '48',
    'tomfh': '48', // FAKE
    'cymc': '49',
    'cymca': '49', // FAKE
    'cymr': '51',
    'cyms': '49', // FAKE
    'rb': '53',
}

export const DRUMS_NOTE_MAPPING = {
    //22: '22',// ??
    26: 'hh', // + HH
    35: 'bda', // Acoustic Bass Drum
    36: 'bd', // Bass Drum 1
    37: 'ss', // Side Stick
    38: 'sn', // Acoustic Snare   // sna sn
    39: 'hc', // Hand Clap
    40: 'sne', // Electric Snare
    41: 'tomfl', // Low Floor Tom
    42: 'hhc', // Closed Hi Hat
    43: 'tomfh', // High Floor Tom
    44: 'hh', // Pedal H-Hat
    45: 'toml', // Low Tom
    46: 'hho', // Open Hi-Hat
    47: 'tomml', // Low-Mid Tom
    48: 'tommh', // Hi Mid Tom
    49: 'cymc', // Crash Cymbal 1
    50: 'tomh', // High Tom
    51: 'cymr', // Ride Cymbal 1
    52: 'cymch', // Chinese Cymbal
    53: 'rb', // Ride Bell
    //54: '54',
    55: 'cyms', // Splash Cymbal
    56: 'cb', // Cowbell
    57: 'cymca', // Crash Cymbal 2
    //58: '58',
    59: 'cyma', // Ride Cymbal 2   (cyma or cymb?)
    //60: '60',
    //61: '61',
    //62: '62',
    //63: '63',
    //64: '64',
    //65: '65',
    //66: '66',
    //67: '67',
    //68: '68',
    //69: '69',
    //70: '70',
    //71: '71',
    //72: '72',
    //73: '73',
    //74: '74',
    //75: '75',
    //76: '76',
    //77: '77',
    //78: '78',
    //79: '79',
    //80: '80',
    //80: '81',
};

export const COMMAND_STOP       =  8;
export const COMMAND_START      =  9;
export const COMMAND_KNOB       = 11;
export const COMMAND_PITCH_BEND = 14;

export async function getMidi() {
    return await navigator.requestMIDIAccess();
}

export function parseMidiMessage(data) {
    return {
        command:  data[0] >> 4,
        channel:  (data[0] & 0xf), // percussions are the 10th channel (9)
        note:     data[1],
        velocity: data[2] / 127,
    };
}

export function getMidiInputs(midi) {
    return Array.from(midi.inputs.values());
}