code: function onAudioLoad(e) {
      if (audio.soundSource === undefined) {
      // create a sound source
        audio.soundSource = audio.context.createMediaElementSource(audio.element);
      } else {
        audio.soundSource.disconnect();
      }
  
      // Connectors
      audio.soundSource.connect(audio.analyser);
      audio.soundSource.connect(audio.splitter);
  
      // Sound is loaded and ready to start playing
      audio.loaded = true;
    }
docs: Asynchronous callback