rlamana

var extend = Object.getOwnPropertyNames ?
  function ecma5extend(obj) {
    var proto = obj;
    var protos = [];
  	var result = {};
  
  	while (proto) {
  		protos.push(proto);
  		proto = Object.getPrototypeOf(proto);
  	}

rlamana

// Takes string of Note + Octave
// Example:
// var frequency = getFrequency('C3');

var getFrequency = function (note) {
    var notes = ['A', 'A#', 'B', 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#'],
        octave,
        keyNumber;

    if (note.length === 3) {