@EdouardB said:
Out of curiosity, what sound card is everybody using? Call me crazy but I'm starting to wonder whether I should blame my UA Apollo for this madness...
I don't think it is a sound card issue (using MOTU Ultralite here). It must be something somewhere between MacOSX/Kontakt 5.3.1/VE-Pro/Orchestral Tools. For a possible solution they probably need to get together in some way and do the trouble shoot in a groupe effort... IMO...
Well, at least right now it works for me under Kontakt 5.3.0 while everything else is in its latest version. It just won't guarantee that it will work in future versions of Kontakt or even the other involved components...