let interval2;

​

let synth = new Tone.PolySynth();

synth.set({

  "volume": 0.2,

    "envelope": {

    "attack": 0.02,

    "decay": 0.01,

    "release": 0.02

  }

​

})

synth.toMaster();

​

//Melodies

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

​

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){

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

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

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

​

    let note2 = note1 + interval1;

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

    let note3 = note1 + interval2;

    let note3Object = Tone.Frequency(note2, "midi");

​

    synth.triggerAttackRelease([note1Object, note2Object, note3Object], "2n", time);

    synth.triggerAttackRelease(note2Object, "2n", time);

    synth.triggerAttackRelease(note3Object, "2n", 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);

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

  label1 = createP("Interval 1");

  slider1 = createSlider(0, myScale.length - 1, 2, 1);

  label2 = createP("Interval 2");

  slider2 = createSlider(0, myScale.length - 1, 4, 1);

}

​

function draw() {

  background(220);

  interval1 = myScale[slider1.value()];

  interval2 = myScale[slider2.value()];

  label1.html("Interval 1: " + (slider1.value() + 1) + "th (" +   interval1 + " semitones)");

  label2.html("Interval 1: " + (slider2.value() + 1) + "th (" +   interval2 + " semitones)");

}