public ScaleMainFrame() {
    super(new BorderLayout());

    nameTF = new JTextField();
    JPanel top = new JPanel(new BorderLayout());
    top.add(new JLabel("Scale Name:"), BorderLayout.WEST);
    top.add(nameTF, BorderLayout.CENTER);

    PlayButton pb = new PlayButton("PLAY");
    tempoP = new IntSetPanel(1, 10000, "Tempo");
    tempoP.setValue(120);
    JPanel botL = new JPanel(new BorderLayout());
    botL.add(pb, BorderLayout.EAST);
    botL.add(tempoP, BorderLayout.CENTER);
    PianoKeyB kb = new PianoKeyB();
    kb.setPreferredSize(new Dimension(150, 40));
    // JPanel botTop = new JPanel(new GridLayout(1, 2));
    JPanel botTop = new JPanel(new FlowLayout());
    botTop.add(botL);
    botTop.add(kb);

    JButton newB = new JButton("New");
    saveB = new JButton("Save");
    JButton loadB = new JButton("Load");
    newB.addActionListener(this);
    saveB.addActionListener(this);
    loadB.addActionListener(this);
    pb.addActionListener(this);
    JPanel botBot = new JPanel(new GridLayout(1, 3));
    botBot.add(newB);
    botBot.add(saveB);
    botBot.add(loadB);
    JPanel bottom = new JPanel(new BorderLayout());
    bottom.add(botTop, BorderLayout.CENTER);
    bottom.add(botBot, BorderLayout.SOUTH);

    sp = new ScalePanel(this, kb);

    add(top, BorderLayout.NORTH);
    add(sp, BorderLayout.CENTER);
    add(bottom, BorderLayout.SOUTH);
    setPreferredSize(new Dimension(500, 300));

    fileChooser = new JFileChooser(new File("Features/Scales"));
    filter = new ScaleFilter();
    fileChooser.addChoosableFileFilter(filter);
    fileChooser.setFileFilter(filter);
  }