docs: function Loader(loadItem) {
  		this.AbstractLoader_constructor(loadItem, true, createjs.AbstractLoader.SOUND);
  
  		/**
  		 * A Media object used to determine if src exists and to get duration
  		 * @property _media
  		 * @type {Media}
  		 * @protected
  		 */
  		this._media = null;
  
  		/**
  		 * A time counter that triggers timeout if loading takes too long
  		 * @property _loadTime
  		 * @type {number}
  		 * @protected
  		 */
  		this._loadTime = 0;
  
  		/**
  		 * The frequency to fire the loading timer until duration can be retrieved
  		 * @property _TIMER_FREQUENCY
  		 * @type {number}
  		 * @protected
  		 */
  		this._TIMER_FREQUENCY = 100;
  	}