I have successfully compiled the first iteration of the BeatBox application from HF Java 2e. When I run it, although a gui sequencer appears, there is no sound when I add ticks and press "start". In fact, nothing happens at all (i.e., there's no change to the gui either). Obviously, at the very least, there should be some sound. Can anyone help? I'm on Ubuntu 12.04, Java 1.6, Open JDK. Thanks in advance.