Sound Amplitude

let mySound;

let amplitude;

​

function preload() {

  sound = loadSound('02-My_Fair_Lady-05.mp3');

}

​

function setup() {

  createCanvas(500, 500);

  background(100);

  sound.setVolume(1);

  sound.loop();

  amplitude = new p5.Amplitude();

}

​

function draw() {

  background(100, 5);

  stroke(255);

  noFill();

  let amp = map(amplitude.getLevel(), 0, 1, 10, 500);

  ellipse(width/2, height/2, amp, amp);

}

​

function mouseDragged()

{

  let v = map(mouseY, 0, height, 1, 0);

  sound.setVolume(v);

  let p = map(mouseX, 0, width, -1, 1);

  sound.pan(p);

}

​

function mousePressed()

{

  if (sound.isPlaying() == false)

    sound.loop();

}

​

function mouseReleased()

{

  if (sound.isPlaying() == true)

    sound.pause();

}