code: function(_key){
              var _cch = _pcache[_key];
              if (!_cch) return;
              _cch.audio = _h.__getAudioInst({
                  url:_cch.url,
                  onerror:_doErrorAction._$bind(null,_key),
                  ontimeupdate:_doTimeUpdateCallback._$bind(null,_key),
                  onstatechange:_doStateChangeAction._$bind(null,_key)
              });
              _cch.audio._$play();
          }
docs: play action