"volume": -10,

  "envelope": {

    "attack": 0.1,

    "decay": 0.3,

    "release": 2,

  }

}).toMaster();

​

let root = 24;

let octave = 2;

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

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

let scale = major;

​

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

Tone.Transport.bpm.value = 40;

​

function loopCallback(time) {

  // Pick a random note from the scale

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

  let noteNumber = root + scale[pos] + octave * 12;

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

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

​

  var probability = 0.8;

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

    synth.triggerAttackRelease(note, "16n", time, 0.3);

  }

​

}

​

function setup() {

  synthLoop.start();

  Tone.Transport.start();

}

​