From vsyevolod@yahoo.com Tue Sep 04 12:55:51 2012
Subject:Re: Modelled v Sampled Pianos

You also might consider the fact that your keyboard may be sending an uneven MIDI velocity response from the black keys vs. the white keys. A little playing around will verify this. Velocity response is one of the trickiest things to get right when pairing one keyboard with a non-related sound engine.

Stephen