* Audio file: 'Rouge' by Raw Stiles

 * Creative Commons, BY NC ND 

 * http://freemusicarchive.org/music/Raw_Stiles/STOP_2X2_04/A2_Raw_Stiles_-_Rouge_1291

 */

​

let song;

let cnv;

let fft;

let peakDetect;

let pulseSize = 0;

​

function preload(){

  song = loadSound('assets/Raw_Stiles_-_02_-_-smRouge.mp3');

}

​

function setup() {

  createCanvas(400, 400);

  textAlign(CENTER, CENTER);

​

  fft = new p5.FFT();

  peakDetect = new p5.peakDetect();

  noStroke();

  fill(0, 255, 0, 200);

}

​

function draw() {

  background(0);

​

  push();

  fill(255);

  noStroke();

  if (song.isPlaying()){

    text("Click to pause", width / 2, height / 2);

  } else {

    text("Click to play", width / 2, height / 2);

  }

  pop();

​

  fft.analyze();

  peakDetect.update(fft);

​

  if (peakDetect.isDetected){

    pulseSize = 250;

  }

​

  pulseSize = max(pulseSize - 20, 0);

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

}

​

function mousePressed(){

  if (song.isPlaying()){

    song.pause();

  } else {

    song.play();

  }

}

​