* Audio: 'Mushrooms' by Komiku

 *        Public Domain. 

 *        http://freemusicarchive.org/music/Komiku/Captain_Glouglous_Incredible_Week_Soundtrack/bibliothque

 */

​

let song;

let pulseSize = 0;

let fft;

​

​

function preload(){

  song = loadSound('assets/Komiku_-_03_-_Mushrooms.mp3');

}

​

function setup() {

  createCanvas(400, 400);

  song.processPeaks(peaksProcessed);

//  song.play();

  fft = new p5.FFT();

}

​

function draw() {

  background(0);

​

  noStroke();

  fill(random(255), random(255), 0);

    pulseSize = max(pulseSize - 20, 0);

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

  stroke(255, 50);

  noFill();  

​

  let spectrum = fft.analyze();

    for (let i = 0; i < spectrum.length; i++){

    let d = map(spectrum[i], 0, 255, 0, height);

​

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

  }    

}

​

function peaksProcessed(peaks){

    for (let i = 0; i < peaks.length; i++){

    song.addCue(peaks[i], createPulse);

  }

  song.play();

}

​

function createPulse(){

    pulseSize = 250;

}