The German animation artist Oskar Fischinger created An Optical Poem in 1937. This was the first attempt to create something like a manual acoustic visualisation. I am trying to find a new ways to visualize piano rolls by recording pieces I then can manipulate as a MIDI sequence.
Work in Progress
The easiest way to create an animated piano roll is capturing it directly from the software (e.g. Cubase or any MIDI preview application). After separating the bars from the background you are left with many possibilities for experimentation.

Vinyl-Flower image by Sharon Pittaway on Unsplash