The more I explore here the more I am learning (I think!)

After reviewing the StyleMaker, as you guys suggested, I can see that, for each MIDI style, there is a set of patterns of MIDI data that is assembled "on-the-fly" by BIAB. And, unless I am mistaken, these data sets were probably created to approximate the target instrument within reasonable constraints.

And, obviously I can create my own sets of data to match my own playing if I wanted and then these would be assembled "on-the-fly" by BIAB.

What a brilliant, Brilliant, BRILLIANT tool this is!!!