​

let synth1 = new Tone.Synth({

  "volume": -5,

  "oscillator": {

    "type": "sine",

    "phase": 0

  }

});

analyzer1 = new Tone.Waveform(256);

synth1.connect(analyzer1);

synth1.toMaster();

​

let mic = new Tone.UserMedia();

let analyzer2 = new Tone.Waveform(256);

mic.connect(analyzer2);

mic.open();

​

//Melodies

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

​

let fundamental = 261.6*2; // middle C

let factors;

//                C      D      E      F      G      A      B        C

// ratios :       1/1,   9/8,   5/4,   4/3,   3/2,   5/3,   15/8,   2/1

// intervals:  unison,   2nd,   3rd,   4th,   5th,   6th,   7th,     octave

​

// ordered by decreasing consonance (perception varies)

// let factors =    [1/1,   2/1,   3/2,   4/3,  5/4,  5/3,  9/8,   15/18];

// which gives us: 

//              unison, octave, fifth, fourth, third, sixth, second, seventh

​

​

function melodyLoop(time) {

  let p = random();

  if (p < 0.9) {

    let pos = 0;

​

    // a random melody in this scale

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

    let note1 = fundamental * factors[pos];

    synth1.triggerAttackRelease(note1, "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);

  factors = [1 / 1, 2 / 1, 3 / 2, 4 / 3, 5 / 4, 5 / 3, 9 / 8, 15 / 8];

}

​

function draw() {

  background(0);

​

  let waveform1 = analyzer1.getValue();

  let waveform2 = analyzer2.getValue();

​

  strokeWeight(2);

  noFill();

  stroke(255);

  beginShape();

  for (let i = 0; i < waveform1.length; i++) {

    let x = map(waveform1[i], -1, 1, 0, width);

    let y = map(waveform2[i], -1, 1, height, 0);

    vertex(x, y);

  }

  endShape();

​

}