public void actionPerformed(ActionEvent e){
		if(e.getSource() == midiMuteButton){

			// test case
			if(Debug.sound)System.out.println("Mute Button Pressed");

			if(isMidiMute() == false){
				midiMuteButton.setIcon(new ImageIcon("icons/grey/Midi off.png"));
				SlideRenderer.muteBackground();
				setMidiMute(true);
			}else if(isMidiMute() == true){
				midiMuteButton.setIcon(new ImageIcon("icons/grey/Midi on.png"));
				SlideRenderer.unMuteBackground();
				setMidiMute(false);
			}
		} else 	if(e.getSource() == muteAllButton){

			// Test case
			if(Debug.sound)System.out.println("Mute All Button Pressed");
			if(isAllMute() == false){
				muteAllButton.setIcon(new ImageIcon("icons/grey/Sound off.png"));
				SlideRenderer.muteAll();
				setAllMute(true);
			} else if(isAllMute() == true){
				muteAllButton.setIcon(new ImageIcon("icons/grey/Sound on.png"));
				SlideRenderer.unMuteAll();
				setAllMute(false);
			}
		}
	}