File file = chooser.getSelectedFile();
if(returnVal == JFileChooser.APPROVE_OPTION && isMidiFile(file)) {
directory = chooser.getSelectedFile().getParentFile();
File file = chooser.getSelectedFile();
if(returnVal == JFileChooser.APPROVE_OPTION && isMidiFile(file)) {
directory = chooser.getSelectedFile().getParentFile();