that unless the mechanical response curves for a key suddenly change the data stored from the current playback session or even from prior playback sessions should be reasonably accurate for correcting actuator operation in one embodiment of the present system the non real time previous event actuation data is collected on an ongoing basis for each keystroke therein assuring that key velocity corrections are applied based on the most recent key strikes previous event feedback data may be subject to replacement when new key data is made available or more preferably the new data is averaged or otherwise applied across a number of instances to the feedback data by performing updates according to an averaging mechanism the variations with regard to mechanical fluctuations and inaccuracies in the response measurement system can be moderated resulting in less fluctuation of the correction factors between notes in one example a rolling average mechanism can be utilized for updating the previous event feedback data although ongoing updates of the previous event data provide accuracy benefits it should be appreciated that this is not required to practice the non real time approach described herein less preferably the non real time previous event feedback data can be collected in response to.