function(audio) {
      var self = this || Howler;

      // Don't add audio to the pool if we don't know if it has been unlocked.
      if (audio._unlocked) {
        self._html5AudioPool.push(audio);
      }

      return self;
    }
function(audio) {
      var self = this || Howler;

      // Don't add audio to the pool if we don't know if it has been unlocked.
      if (audio._unlocked) {
        self._html5AudioPool.push(audio);
      }

      return self;
    }
function ( audio ) { var self = this || Howler ; // Don't add audio to the pool if we don't know if it has been unlocked. if ( audio . _unlocked ) { self . _html5AudioPool . push ( audio ) ; } return self ; }
Return an activated HTML5 Audio object to the pool.
@return {Howler}
Return an activated HTML5 Audio object to the pool .
Add an audio to the pool