Oh, and doc.. There really isn't ANYTHING that can follow full, normal piano playing perfectly. So much is implied that no machine will ever figure out exactly what you WANT out of all the passing notes, runs, grace notes, clams ( ) and other assorted pianistic things.

Best they manage is a mode where the chord won't change until you hold down more than two notes, so you can play with the sustain pedal down and it won't change, but actually PLAY three notes or more simultaneously and then it goes to the new chord. Add in the mode where it knows what bass note you are playing, and you can get somewhat close to regular piano playing, but it is ALWAYS going to involve some sort of adjustment of technique to work right...