gistfile1.txt

function Poly({world, factory, polyphony}) {

  var output = world.create('UPoly');
  output.channels = {};

  for (var i = 0; i < polyphony; i++) {
    var unit = factory(world);
    output.channels[i] = unit;
    output.addUnit(unit);
  }

  this.set = function (o) {
    for (var _i in o) {
      output[_i] = o[_i];
    }

    output.run('setAll', o);
  };

  return output;
}

var poly = new Poly({
  world: world,
  polyphony: 3,
  factory: function factory(world) {
    return world.create('UZiggy', {
      filename1: '/add_waves/color1.L.ogg',
      filename2: '/add_waves/square_add1.L.ogg',
      filename3: '/add_waves/sine_add4.L.ogg'
    });
  }
});
poly.start({
  key: 4
})