modernizr/feature-detects/audio/webaudio.js

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

/*!
{
  "name": "Web Audio API",
  "property": "webaudio",
  "caniuse": "audio-api",
  "polyfills": ["xaudiojs", "dynamicaudiojs", "audiolibjs"],
  "tags": ["audio", "media"],
  "builderAliases": ["audio_webaudio_api"],
  "authors": ["Addy Osmani"],
  "notes": [{
    "name": "W3C Spec",
    "href": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html"
  }]
}
!*/
/* DOC
Detects the older non standard webaudio API, (as opposed to the standards based AudioContext API)
*/
define(['Modernizr'], function(Modernizr) {
  Modernizr.addTest('webaudio', function() {
    var prefixed = 'webkitAudioContext' in window;
    var unprefixed = 'AudioContext' in window;

    if (Modernizr._config.usePrefixes) {
      return prefixed || unprefixed;
    }
    return unprefixed;
  });
});