let song;

let button;

let amp;

​

let volhistory = [];

​

function playSong() {

  if (song.isPlaying()) {

    song.pause();

  } else {

    song.play();

  }

}

​

function preload() {

  song = loadSound("peaches.mp3");

}

​

function setup() {

  createCanvas(300, 300);

  button = createButton("go/stop");

  button.mousePressed(playSong);

  song.play();

    amp = new p5.Amplitude();

 // mic = new p5.AudioIn();

  //mic.start();

​

}

​

function draw() {

  background(0);

  let vol = amp.getLevel();

  volhistory.push(vol);

  console.log(vol);

  stroke(255);

  noFill();

  beginShape();

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

    let y = map(volhistory[i], 0, 1, height / 2, 0);

    vertex(i, y);

  }

  endShape();

​

  if (volhistory.length > width) {

    volhistory.splice(0, 1);

  }

​

  stroke(255, 0, 0);

  line(volhistory.length, 0, width, 1);

​

  //ellipse(100, 100, 300, vol * 2000);

}

​