Tone.start();

  print("Audio started!");

}

​

function keyPressed() {

  const fmSynth = new Tone.FMSynth().toDestination();

  // Play a single note

  // const note = "C5";

  // play a random midi note

  // const midiNote = int(random(0, 128));

  // const note = Tone.Frequency(midiNote, "midi").toFrequency();

  // play a random note within a set of notes

  // const notes = [60, 63, 65, 67, 70 ];

  // const midiNote = notes[int(random(0, notes.length))];

  // const note = Tone.Frequency(midiNote, "midi").toFrequency();

  // fmSynth.triggerAttackRelease(note, "2fn");

  // play random note within a set of notes, multiple octaves

  const notes = [0, 3, 5, 6, 10];

  const root = 48;

  const numOctaves = 2;

  const midiNote = root + notes[int(random(0, notes.length))] + 

        12*int(random(0, numOctaves));

  const note = Tone.Frequency(midiNote, "midi").toFrequency();

  fmSynth.triggerAttackRelease(note, "2n");

}

​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(220);

  text("Press any key to play a note.", 20, 30);

}