Ctone,

What version of BIAB do you have?

Also, if you are talking MIDI-based styles, they can only sound as good as the synthesiser that's playing them. So if you're using a built-in computer synth it's more than likely the sounds will be lower quality.

Have listen to some of the Realtrack Jazz demos for BIAB 2013 at the following link. These are audio files that have all been created in BIAB (no dressing up).

http://www.pgmusic.com/bbwin.realtracks.htm

The below link are to MIDI-based styles using a reasonable quality synthesiser.

http://www.pgmusic.com/addons.supertracks.php

All the best,
Noel