Hello Dave
More of a personal hearing quirk I guess. Really no big deal to many I suppose.
Seems to have a cleaner sound to the high frequencies and a greater separation between highs and lows seem to be more pronounced.
But, understand, sounds sound different because of many - many- variables. So many in fact that I will address only a few.
1> Listening area acoustics. Being very critical, add or remove a big plush sofa - changes area acoustics therefore the sound.
2> The sound card being used. Change it and you will probably experience a different, not especially a better or worse sound - but you percieve there is a difference therefore you judge that one is good and the other bad. This may not in fact be true (based on someone elses sound preferrence. Get the idea?
3> Speaker System - Are you using the computer single speaker or an elaborate digital surround system. I'm sure you will agree that there will be a difference. I use Creative 6 speaker (including sub woofer) digital surround sound speakers that I can't drive to distortion unless you crank it really high then it becomes unbearably loud and hurts my ears.
There isn't anything really wrong with DFX DSP. I have used it on/off for several years for many hours of listening enjoyment and it's still on my computer ready for use depending on my personal taste at any given moment. Yep - women do not have the exclusive right to change their mind ever now and then just to keep people on their toes or whatever.
Hope that this helps in some small way.
Later - sg2