synth.set({

  "volume": 0.3,

  "envelope": {

    "attack": 0.8,

    "release": 0.4

  }

})

synth.toMaster();

​

//Melodies

let ml = new Tone.Loop(melodyLoop, "4n");

​

let major = [0, 2, 4, 5, 7, 9, 11, 12];

let minor = [0, 2, 3, 5, 7, 9, 10, 12];

let root = 21; // lowest A in MIDI

let octave = 2;

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

​

function melodyLoop(time) {

  let p = random();

  if(p < 0.9){

    // melody

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

    let note1 = root + myScale[pos] + octave * 12;

    let note1Object = Tone.Frequency(note1, "midi");

    // parallel harmony

    let semitones = 7; // a fifth

    let note2 = note1 + semitones;

    let note2Object = Tone.Frequency(note2, "midi");

​

    synth.triggerAttackRelease(note1Object, "4n", time);

    synth.triggerAttackRelease(note2Object, "4n", time);

  }

}

​

// Start

function mouseClicked() {

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

    Tone.context.resume();

  }

  Tone.Transport.start();

  ml.start();

}

​

​

let label;

let slider;

​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(220);

  text("Click to Start", 40, 40);

}