On Linux systems, you may include support for FM sound or for digitized sound
into xpat2. You need Hannu Savolainen's sound-kit
version 2 or better5.
To use FM sound, you have to load an instrument into midi-channel 9 of
the kernel (some type of bell, usually).
Then you will hear these bells ringing when you successfully played a game.
FM sound support uses the device /dev/sequencer.