​

function setup() {

  createCanvas(400, 400);

  osc = new p5.Oscillator();

  osc.start();

}

​

function draw() {

  background(220);

  let pitch = map(mouseX, 0, width, 200, 800, true);

  osc.freq(pitch);

  let vol = map(mouseY, 0, height, 0, 1);

  osc.amp(vol);

}

​

​

​