anchor.diff:      volumeSlider = new RangeSlider($["volumeSlider"]);
       stream = $["audioElement"];
   
  +    setupHotKeys();
       setupListeners();
       loadMetaData();
   
  
positive.code:     setVolume(0.0);
    }
  
    void setVolume(double vol) {
      if(isPlaying || vol == 0.0)
        stream.volume = vol;
    }
  }
negative.code:     play();
    }
  
    void setupHotKeys() {
      window.onKeyPress.listen((KeyboardEvent e) {
        e.preventDefault();
  
        // Pause/Play
        if(e.keyCode == KeyCode.SPACE) {
          toggleSound(e);
        }
  
        // Change volume
        else if(e.keyCode == 44) {
          setVolume(getVolume() - 0.05, true);
        }
        else if(e.keyCode == 46) {
          setVolume(getVolume() + 0.05, true);
        }
  
      });
    }
  
    void loadMetaData() {
      DivElement title = $["songTitle"];
      DivElement artist = $["songArtist"];
  