* Audio: 'Ain't we got fun' performed by the Benson Orchestra

 *        Public Domain. 

 *        http://www.digitalhistory.uh.edu/music/music.cfm

 */

​

let song;

let fft;

​

function preload(){

 song = loadSound('assets/aint_we_got_fun_benson_orch.mp3');

//   song = loadSound('assets/aint_we_got_fun_benson_orch-8.wav');

}

function setup() {

 createCanvas(windowWidth, windowHeight);

 stroke(255,0,0); 

 strokeWeight(4);

 noFill();

 textAlign(CENTER, CENTER);

 textStyle(BOLD);

 textSize(24);

​

 // song.play();

 fft = new p5.FFT();  

}

function draw() {

 background(0);

 let waveform = fft.waveform();

​

 if (song.isPlaying()){

   stroke(255, 0, 0);

 } else {

   stroke(150);

 }

​

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

   let x = map(i, 0, waveform.length, 0, width);

   let y = map( waveform[i], -1, 1, 0, height);

   point(x,y);

 }

​

 if (!song.isPlaying()){

   push();

   noStroke();

   fill(150);

   rect(width / 2 - 100, height / 2 - 50, 200, 100, 20);

   fill(0);

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

   pop();

 }

}

​

​

function toggleSongPlayback(){

  if (song.isPlaying()){

   song.pause();

  } else {

   song.play();

  }  

}

​

function mouseClicked(){

  toggleSongPlayback();

}

​

function keyPressed(){

  toggleSongPlayback();

}

​

​