I asked this question several months ago about why did the Atari produce beeping sounds when loading a disk or tape and it seems that it was by design. However, as I've played with a few emulators over the years it seems to me that none of them actually reproduce the SIO sounds. Digging into the options of the Atari 800 emulator (for Windows and Mac OS X), I don't seem to find anything that suggests that this sound can be enabled or disabled.
Are there any emulators that emulate this sound? I'm curious why is it disabled on the emulators since aren't they trying to at least provide an authentic reproduction of the original platform?
(yeah, I'd probably enable it for about 5 minutes before muting it again, but as far as platform authenticity in emulation goes you'd think it should at least be there?)