function preload() {

  soundFormats("mp3", "ogg");

  mySound = loadSound("kotoish-short");

}

​

function setup() {

  let cnv = createCanvas(100, 100);

  cnv.mousePressed(canvasPressed);

  background(220);

  text("tap here to play", 10, 20);

}

​

function canvasPressed() {

  // playing a sound file on a user gesture

  // is equivalent to `userStartAudio()`

  mySound.play();

  mySound.loop();

}

​