This one goes *way* back - to 1988 or so, actually. The "16bit pictures at an exhibition' is what will happen if you let a student alone with the piano notes to Modeste Mussorgsky's classic masterworkand and a 4 audio-channel homecomputer, the Commodore Amiga, for too long. ;)
The idea was to create an own electronic version of this classic music without copying the previous electronic arrangement by Tomita - which was not that hard, given the completely different quality and level of the hardware involved: The Commodore Amiga had only four voices, not allowing for a 1:1 adaptation of all the tunes and chords, so some major cutting had to be done there. Also the software I used back then was pretty basic as well, for example not allowing for such simple thing as in-tune-tempo-changes, also a big minus when working with classic music.
On the other side the Amiga with Sonix running allowed for the use of samples as well as a nice little own synthesizer, enabling me to give my version it's very own little atmosphere and style (including, for example, samples from Front242 or Invincible Spirit in Baba Yaga).