code: function(_key){
              var _cch = _pcache[_key];
              if (!_cch) return;
              if (!!_cch.audio){
                  _cch.audio = _cch.audio._$recycle();
              }
              if (!!_cch.timer){
                  _cch.timer = window.clearTimeout(_cch.timer);
              }
          }
docs: stop action