Depending on the style in BB.. some will use real tracks and some will be predominately midi based.

Taking ANY of the BB files and opening it in Real Band and allowing it to render to real tracks is generally always a major improvement for me. Some will still want to render as midi tracks in RB, BUT, you can always mute them and then select a real track from the list and use that....

As far as final volume levels..... are you exporting it to a third party AUDIO EDITOR such as WAVEPAD ? http://www.nch.com.au/wavepad/index.html

If not, you really should add that step to the process. In the editor you can trim the start and end, convert to MP3 from WAVE.... and you should ALWAYS export in WAVE.....plus, you can run a NORMALIZE function on the wave before you convert it to MP3. Normalizing will generally add a few db increase of volume to a file.... I use it on all my tunes as the final step before converting or saving the wave.

For live performance always try to use WAVE files not MP3 except as a last resort when you can not get the wave.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
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The magic you are looking for is in the work you are avoiding.