Playing around with wavepot

goaway.js

// lfairy - go away

Array.prototype.sum = function() {
  return this.reduce(function(a, b) { return a + b; }, 0);
};

function dsp(t) {
  var base = Math.floor(t) % 2 ? 261.63 : 220;

  var wave = [base, 3/2 * base, 4/3 * base, 5/2 * base].map(function(freq) { return 0.1 * sub(sin(freq, t), 1, t); }).sum();
  
  var drone = [110, 440, 880].map(function(freq) { return 0.1 * sin(freq, t); }).sum();

  return wave + (1 + sin(1/8, t)) / 2 * drone;
}

var TAU = 2 * Math.PI;

function sin(freq, t) {
  return Math.sin(TAU * t * freq);
}

function saw(freq, t) {
  return t * freq % 2 - 1;
}

function sqr(freq, t) {
  return Math.floor(t * freq % 2) ? -1 : 1;
}
 
function sub(wave, mul, t){
  return Math.sin(wave * mul + TAU * t);
}

quasiphone.js

// lfairy - quasiphone

var speed = 4;

var tenor = [-5, 0, 4, 0, -3, 0, 4, 0];
var alto = [0, 4, 7, 4, 0, 4, 7, 4];

function dsp(t) {
  var m = Math.floor(t * speed);
  var wave1 = 0.5 * quasiphone(pitch(tenor[m % tenor.length]), m / speed, t);
  var wave2 = 0.5 * quasiphone(pitch(alto[m % alto.length]), m / speed, t);
  return wave1 + wave2;
}

function quasiphone(freq, s, t) {
  return damp((4 * sin(freq, t) + sin(1.99*freq, t) + sin(2.01*freq, t) + sin(3.01*freq, t)) / 7, 8, t - s);
}

function pitch(x) {
  // Middle C is 0
  return 261.63 * Math.pow(2, x/12);
}

var TAU = 2 * Math.PI;
 
function sin(freq, t) {
  return Math.sin(TAU * t * freq);
}

function damp(wave, a, t) {
  return Math.exp(-a * t) * wave;
}

I'll just leave this here....

var speed = 120000002;

AND

var speed = 160000002;