Visualize Sound Amplitude

let sound;

let analyzer;

​

function preload() {

  sound = loadSound("./beat.wav");

}

​

function setup() {

  createCanvas(windowWidth, windowHeight);

}

​

function draw() {

  background(0);

  if (mouseIsPressed) {

    if (sound.isPlaying() == false) {

      sound.loop();

      analyzer = new p5.Amplitude();

      analyzer.setInput(sound);

    }

    var rms = analyzer.getLevel();

    fill(31, 127, 255);

    noStroke();

    let diameter = map(rms, 0, 1, 10, width);

    circle(width / 2, height / 2, diameter);

  } else {

    sound.stop();

  }

}