var fft;

var button;

//var mic;

​

​

let w; 

let bins = 16; 

let smoothingValue = 0.0;

​

function toggleSong(){

  if(song.isPlaying()){

    song.pause();

  }else{

    song.play();

  }

}

​

function preload(){

  song = loadSound('bedtime.mp3')

}

​

function setup() {

  createCanvas(256, 256);

  angleMode(DEGREES);

  colorMode(HSB);

  button = createButton('toggle');

  button.mousePressed(toggleSong);

  //mic = new p5.AudioIn();

  //mic.start();

  song.play();

  fft = new p5.FFT(smoothingValue,bins);

  w = width/bins; 

}

​

function draw() {

  background(0);

  let spectrum = fft.analyze();

  //stroke(255);

  noStroke();

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

    let amp = spectrum[i];

    let ampHeight = map(amp,0,256,height,0);

    fill(i,255,255);

    rect(i * w, ampHeight, w - 2, height - ampHeight);

  }

  console.log(spectrum[0]);

}