ESP?was the precursor to BitGlitter. You can even see that it’s got ‘Bit Glitter’ on its only control. This was meant to be an Emu SP-1200, but it didn’t really manage to do that. However, it did manage to produce a legit sound of its own, in that general area.

ESP bitcrushes and sample rate chops, and then smooths out the result to produce more of an ‘analog device’ output rather than straight-up digital derezzing.