let sliderVolume;

​

function preload() {

  mySound = loadSound('sound.mp3');

}

​

function setup() {

  createCanvas(400, 400);

​

  button = createButton("play");

  button.mousePressed(togglePlaying);

​

  sliderVolume = createSlider(1, 100, 1); //taille départ, taille finale

  sliderVolume.position(40, height - 100);

​

​

}

​

​

​

function togglePlaying() {

  if (!mySound.isPlaying()) {

    mySound.play();

    button.html("pause");

  } else {

    mySound.pause();

    button.html("play");

  }

}

​

​

​

​

function draw() {

  background(220);

​

  let valVolume = sliderVolume.value();

​

​

  mySound.setVolume(valVolume);

​

}