It's interesting that the Roland DSP does eloquently map to solutions in the z-domain, and allow easy implementation of FIR/IIR filters.

It's not surprising they doubled the clock rate to 88.2kHz to simplify anti-aliasing, but it is curious the choice of the CD audio frequency of 44.1kHz and not the DAT tape frequency of 48kHz.

It's hard not to get nostalgic about the 90s when watching this video.