I've written about this before but because of the useless search feature on this forum I can't find the thread. If I'm missing something re: search functionality, please let me know [:S]
Anyway, no matter what I try, there's something wrong between VE Pro and Logic when it comes to bounces. Quite often I'll play back a newly-bounced file and something sounds just slightly off. So I flip the phase on the bounce and play it against the original MIDI regions. If it's right, it SHOULD completely null (it does when I host instruments directly in Logic, but it doesn't when things are hosted in VE Pro). I've moved bounced regions both directions by a single sample (consecutively) to see if it's just a sample offset issue, and that doesn't help.
Tthe only explanation that makes sense is that there are MIDI timing errors happening in the VE Pro engine during rendering, because certain notes jump out more than others when the phase is flipped. If timing were consistent, the whole file should just sound "phasey" by the amount of sample offset. As much as I'm loving VE Pro, this concerns me - if it can't properly render audio, the whole thing is a moot point! Again, I've tried all manner of delay compensation prefs (both Logic & VE Pro), realtime vs. offline bounce, etc. and this continues to occur.
Test setup: Mac Pro 8-core (2008) running OSX 10.6.3, Logic 9.1.1, VE Pro 4.0.6150 (64 bit server hosting Kontakt 4.1.1, Vienna Instruments 2.1.5740)