android laughter

// wavepot.com
// android laughter - justaboutdead
var volume = 1;

var tau = 2 * Math.PI;

var pitch = 1;

var chorus;
var voices = 8;
var separation = 3/tau;
var detune = 1;

function dsp(t){
  chorus = 0;
  for(i = 0; i < voices; i++){
    chorus += sub( (1 / voices) * $(pitch + (detune * i), t + (i * separation)), 30, t) / voices;
  }
  return volume * chorus;
}


function $(n, t){
  return sub(1 * tri(n, t) + 10 * sin(n * .01, t), (1 + sin(1, t)) * (0 + (1 + sin(0.1, t)) * 10), t);
}

function sub(wave, mul, t){
  return Math.sin(wave * mul + tau * t);
}

function sin(x, t){
  return Math.sin(tau * t * x);
}

function tri(x, t){
  return Math.abs(1 - (2 * t * x) % 2) * 2 - 1;
}