At this point I would doubt that pro pianists could tell the difference in a blind test environment.
Regardless of what pianists will tell you, there is just one variable (hammer velocity) to actual sound production (by that point the hammer is decoupled from the key and whatever you do to the key after the first 5-7 mm of travel is of no consequence).
So the only "real" problem to solve is correctly measuring the desired speed and launching the hammer quickly enough.
Regardless of what pianists will tell you, there is just one variable (hammer velocity) to actual sound production (by that point the hammer is decoupled from the key and whatever you do to the key after the first 5-7 mm of travel is of no consequence).
So the only "real" problem to solve is correctly measuring the desired speed and launching the hammer quickly enough.