let fft;                         //

​

function setup() {

  createCanvas(400, 400);

  mic = new p5.AudioIn();        //use p5 audio

  mic.start()                    //start recording

  fft = new p5.FFT();            //new object

  fft.setInput(mic);             //feed mic into fft

}

​

function draw() {

  /*

  background(220);

  let level = mic.getLevel();

  if (level>0.3) background(random(255));

  ellipse(width/2,height/2,level*100,level*100) //visualize sound

  console.log(level);

  */

  /*

  let bins = fft.analyze();       //1024 containers

  for(let b = 0; b<bins.length; b++){

    let bin = bins[b];

    line(b,0,b,bin);

  }

  */

  /*

  background(255);

  let bins = fft.analyze();       //1024 containers; 0 to 22KHz

  for(let b = 0; b<bins.length; b++){

    let bin = bins[b];

    line(b,height-bin,b,height);

  }

  */

  let wave = fft.waveform();

  beginShape();

  for(let w = 0; w<wave.length; w++){

    let y = wave[w] * 200 +height/2;

    vertex(w,y)

  }

  endShape();

}