var song;

var button;

var amp;

​

var volhistory=[]; 

​

function preload(){

  song=loadSound("thisdot.mp3");

}

​

function setup() {

  createCanvas(300,300);

  button=createButton('toggle');

  button.mousePressed(toggleSong);

  song.play();

  amp= new p5.Amplitude();

  // mic=new p5.AudioIn();

  // mic.start();

}

​

function draw() {

  background(100);

  // vol=mic.getLevel();

  // diam=map(vol,0,1,1,3900);

  var vol=amp.getLevel();

  volhistory.push(vol); 

  stroke(255);

  noFill();

  beginShape();

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

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

    vertex(i,y);

  }

  endShape();

  if (volhistory.length>width){

    volhistory.splice(0,1);

  }

}

  stroke(255,0,0);

  line(width,0,width1)

​

​

​

function toggleSong(){

if(song.isPlaying()){

  song.pause();

}else{

  song.play();

}

}