Web Audio boilerplate, variables, and functions

webAudioWrap.js

//
// convenient variables and functions to schedule and control Web Audio; 
// also useful for controlling other systems using Web Audio's utilities
// 

window.AudioContext = window.AudioContext || window.webkitAudioContext;
var audioContext = new AudioContext();
var baseFreq = 440; // A4, Midi Note #69
var baseTempo = 120; // BPM
var audioOut = audioContext.destination;