With a Jordan Rudess or similar human machine around , who needs a man-made machine to test/measure a given board/action’s repeatability?
“Improvisation …. not allowed at Juilliard?” What?!
Is that why the 70’s-80’s ( my heyday youth era) commercial music/pop/rock industry was littered with many “ studied, at Juilliard … for a while . “ musicians and other performers (like dancers)?
Just with the dancing industry alone, think of how many melodramas/docudramas and period-piece movies made for big screens and little screens that would not exist without formal improv training.
My Kawai & Yamaha DPs offer a few 3-5 adjustments (software) options for tweaking key-press / force(speed) dynamics, and my Roland has a granularity range of 100. None of the three have an adjustment ( that i know of) for tweaking how fast the action can repeat notes. However, my skill level might be able to press keys faster than the DP’s computer can faithfully produce the sound BUT within the context of playing an actual piano song or passage, i cannot press the keys fast enough to exceed the capacity of any of these three boards. This may be one of those YSLMV situations - your speed limit may vary.