I'm using JABB3 with Logic ProX.  I'm assuming all the sounds are sampled.  To just point out one instrument, the Tenor Sax, if I play around the middle C area going up, the notes sound pretty even up to a certain point.  If I go just one note down from middle C to B, the note sound different.  What I mean by that is, the volume is lower and it definitly sounds different tone quality wise.  I also experience this same problem with Trumpet 2 and with the Baritone Sax and the Piano.  I would think that all the notes played on any of the instruments should sound evenly balanced and all the same.  In the Trumpets, the only one that sound authentic to me is Trumpet 1.  The rest don't sound like trumpets.  Now I must say when I solo the trumpets as a section playing in 4 part harmony, they do sound  pretty good.  So that's the issue I'm having with JABB3.

Thanks.