@Override
			  public void handle(ActionEvent e) {
				  File dir = directoryBrowse.showDialog(primaryStage);
				  loadAllAudioFiles(dir,0);
				  if (mediaPlayer == null){
					  mediaPlayer = new MediaPlayer(new Media("file:/"+encodeURL(songNameLocMap.values().iterator().next())));
			    	  spectrumListener = new SpectrumListener();
			    	  mediaPlayer.setAudioSpectrumListener(spectrumListener);
			    	  mediaPlayer.play();
				  }
				  UpdateVisualization();
			  }