let fft = new Tone.FFT(512);

mic.connect(fft);

mic.open();

​

function setup() {

  createCanvas(400, 100);

​

}

​

function draw() {

  background(255);

  let frequencyData = fft.getValue();

​

  noStroke();

  fill(0);

  beginShape();

  vertex(0, height);

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

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

    let y = map(frequencyData[i], -127, 0, height, 0);

    vertex(x, y);

  }

  vertex(width, height);

  endShape();

​

}