let interval2;

​

let synth = new Tone.PolySynth();

synth.set({

  "volume": 0.2,

  "envelope": {

    "attack": 0.02,

    "decay": 0.1,

    "release": 0.5

  }

})

synth.toMaster();

​

//Melodies

let ml = new Tone.Loop(melodyLoop, "2n");

​

let major = [0, 2, 4, 5, 7, 9, 11];

let minor = [0, 2, 3, 5, 7, 9, 10];

let root = 21; // lowest A in MIDI

let octave = 1;

let myScale = major; // try minor and other modes

​

function melodyLoop(time) {

  let degree = floor(random(0, myScale.length));

  playDiatonicChord(degree, time);

}

​

function playDiatonicChord(degree, time) {

  playNote(degree, time);

  playNote(degree + 2, time);

  playNote(degree + 4, time);

  playNote(degree + 6, time);

}

​

function playNote(pos, time) {

  let degree = pos % myScale.length;

  let octave2 = octave + floor(pos / myScale.length);

  let note = root + myScale[degree] + octave2 * 12;

  let noteObject = Tone.Frequency(note, "midi");

  synth.triggerAttackRelease(noteObject, "2n", time);

​

}

​

// ...and one might want to separate the calculation of the MIDI note from the actual playback

​

// Start

function mouseClicked() {

  if (Tone.context.state !== 'running') {

    Tone.context.resume();

  }

​

  Tone.Transport.start();

  ml.start();

}

​

function setup() {

  createCanvas(400, 400);

  //createSlider(min, max, value, step)

​

}

​

function draw() {

  background(220);

​

}