private ISound addSound()
     throws UnsupportedAudioFileException, IOException, LineUnavailableException {
   ISound result = soundFactory.createSound();
   result.load();
   result.setRepeat(false);
   result.closeOnEnd(false);
   result.setVolume(volume);
   soundList.add(result);
   return result;
 }
 private void setAllVolumes() {
   for (ISound sound : soundList) sound.setVolume(volume);
 }