demo3.ts

var fs = require('fs');
var Midi = require('jsmidgen');
var Util = require('jsmidgen').Util;
import mm = require('./MusicMaker')

var beat = 128;
var DrumNotes = mm.DrumNotes;
var selectRandom = mm.SelectRandom;
var makeChord = mm.MakeChord;
var addRhythmPattern = mm.AddRhythmPattern;
var ChordType = mm.ChordType;



function demo3() {
    var file = new Midi.File();
    var track;
    var j;

    track = new Midi.Track();
    track.setTempo(80);


    file.addTrack(track);

    for (j = 0; j < 8; j++) {

        var scale1 = mm.MakeScale("a5", mm.ScaleType.Blues, 1);
        var i;
        for (i = 0; i < 4 * 4 * 2; i++) {
            var velocity = Math.floor(Math.random() * 100);
            var currentNote = mm.SelectRandom(scale1);
            track.addNote(0, currentNote, beat / 2, 0, velocity)
        }

    }


    track = new Midi.Track();
    file.addTrack(track);

    for (j = 0; j < 8; j++) {

        track.addChord(0, mm.MakeChord("a4", ChordType.Major), beat * 4);
        track.addChord(0, mm.MakeChord("g4", ChordType.Major), beat * 4);
        track.addChord(0, mm.MakeChord("f4", ChordType.Major), beat * 4);
        track.addChord(0, mm.MakeChord("e4", ChordType.Major), beat * 4);

    }


    track = new Midi.Track();
    file.addTrack(track);

    mm.Repeat(8, function () {
        track.addNote(0, "a2", beat * 3);
        track.addNote(0, "a2", beat);
        track.addNote(0, "g2", beat * 3);
        track.addNote(0, "g2", beat);
        track.addNote(0, "f2", beat * 3);
        track.addNote(0, "f2", beat);
        track.addNote(0, "e2", beat * 3);
        track.addNote(0, "e2", beat);

    })


    track = new Midi.Track();
    file.addTrack(track);

    mm.Repeat(8, function () {
        mm.AddRhythmPattern(track, "x---|---x|x---|---x", mm.DrumNotes.BassDrum1);
    })

    track = new Midi.Track();
    file.addTrack(track);
    mm.AddRhythmPattern(track, "----|x---|----|x---", mm.DrumNotes.SnareDrum);
    mm.AddRhythmPattern(track, "----|x---|----|x--x", mm.DrumNotes.SnareDrum);
    mm.AddRhythmPattern(track, "----|x---|----|x---", mm.DrumNotes.SnareDrum);
    mm.AddRhythmPattern(track, "----|x---|---x|x---", mm.DrumNotes.SnareDrum);
    mm.AddRhythmPattern(track, "----|x---|----|x---", mm.DrumNotes.SnareDrum);
    mm.AddRhythmPattern(track, "----|x---|----|x--x", mm.DrumNotes.SnareDrum);
    mm.AddRhythmPattern(track, "----|x---|---x|x---", mm.DrumNotes.SnareDrum);
    mm.AddRhythmPattern(track, "----|x---|----|x---", mm.DrumNotes.SnareDrum);



    fs.writeFileSync('test.mid', file.toBytes(), 'binary');


}


demo3();