var synthScale;

​

synth = new Tone.PolySynth({

  "volume": -10,

  "envelope": {

    "attack": 0.1,

    "decay": 0.3,

    "release": 2,

  }

}).toMaster();

​

synthScale = ["C2", "E2", "G2", "A2",

  "C3", "D3", "E3", "G3", "A3", "B3",

  "C4", "D4", "E4", "G4", "A4", "B4", "C5"

];

​

Tone.Transport.bpm.value = 40;

var synthLoop = new Tone.Event(loopCallback, "16n");

synthLoop.loop = true;

synthLoop.loopEnd = "16n";

​

​

function loopCallback(time) {

  // Drone

  synth.triggerAttackRelease("C2", "4n", time, 0.7);

  // Upper melody  

  // Pick a random note from the scale

  var pos = floor(random(0, synthScale.length));

  var currentNote = synthScale[pos];

  var velocity = 0.4 + Math.random() * 0.5;

  var probability = 0.9;

  if (random() < probability) { // Stay silent sometimes

    synth.triggerAttackRelease(currentNote, "16n", time, velocity);

  }

​

​

}

​

function setup() {

    synthLoop.start(0);

  //synthLoop.start("2n");

    Tone.Transport.start();

}

​

function draw() {

​

}

​