But this only simulates keyboard and mouse click sounds. In any case, you wrote "whenever you start a game or app" (my emphasis). The Model II's fan and drive noises are 100% present from start to finish, with the combination enough to drive users insane (or, at least, not want to use the $5-10,000 computer).
I kind of miss the bass drop the Model 16's "Thinline" drives did when they were accessed. That was a cool sound.