I imagine the demo to be playing a Nancarrow Player Piano Study like no. 36 or 37 (or Tango?). No. 36 is a 4 part canon where each part moves in a different te

I imagine the demo to be playing a Nancarrow Player Piano Study like no. 36 or 37 (or Tango?). No. 36 is a 4 part canon where each part moves in a different tempo, forming a tempo ratio 17:18:19:20. Imagine taking a Bach fugue and applying a skewX or perhaps a Gaussian blur to it. All the voices converge roughly in the middle of the piece to create a striking texture unplayable by humans. No. 37 is a twelve-voice canon with an esoteric relationship among the voices (based on pitch-interval ratios of a particular scale from a book by Henry Cowell.) It's basically a series of little episodes where he trains the listener to focus on the texture-- because what else could you focus on in a twelve-voice canon? Then at the end, he introduces this low, enigmatic ricercare tune that builds into this enormous, sprawling texture of harmonic and melodic surprises, like aliens slowly descending upon Eisenach 300 years too late to find their lost ancestor. Trimpin made MIDI recordings of the 50+ player piano etudes back in the 90s. And if copyright weren't full of anachronistic concepts, one of them would be the Lenna of MIDI piano demos in the 21st century. Unfortunately, copyright is still full of anachronistic concepts. So instead you get an early Debussy piece. And where you would have said, "Holy shit, that is wild!" to a demo that properly shows off all the work the author put into MIDI-fying a baby ground, you instead say, "Hm, neat."