i'm trying to root out the difference between what I hear when I play back my Finale file with GPO4 voices and Ambience, and what the AIFF or WAV files sound like. Direct playback from within Finale sounds fine, but the output file is noticeably inferior: the bass loses its bite, upper registers become thin and hollow, and the reverb density is reduced to the point you can actually hear it cycling in the upper registers. This discrepancy is very disappointing....and I've been struggling with it for quite a while now.

I'm using Finale 2010, GPO4, and the built in Aria plug-in.
Mac OS X