let aenv, fenv;

let dtime = 0.7

​

function setup() {

  canvas = createCanvas(400, 400);

  canvas.mousePressed(playSound);

  car = new p5.Oscillator();

  aenv = new p5.Envelope(0.3, 1, dtime, 0);

  fenv = new p5.Envelope(0.1, 1, 0.2, 0);

  console.log(aenv.decayTime);

}

​

function draw() {

  background(220);

}

​

function playSound() {

  fenv.mult((height - mouseY) * 5);

  dtime = mouseX/width;

  aenv.set(0.3, 1, dtime)

  car.start();

  fenv.play();

  car.freq(fenv);

  aenv.play(car);

}