Frequency

var mic, fft, spectrum, l;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  mic = new p5.AudioIn();

  mic.start();

  fft = new p5.FFT();

  fft.setInput(mic);

  angleMode(DEGREES);

}

​

function draw() {

  background(225);

  spectrum = fft.analyze();

  var i = 0;

  for (angle = 0; angle < 360; angle += 360/300) {

    l = map(spectrum[i], 0, 255, 0, 500);

    noFill();

    ellipse(windowWidth/2, windowHeight/2, 600);

    line(windowWidth/2, windowHeight/2, windowWidth/2 + l*cos(angle), windowHeight/2 + l*sin(angle));

    i += 1

  }

}