In a brass arrangement, I noticed that the first dozen or so notes were varying in tempo. Sometimes all in tempo, sometimes slower or faster in different places, which was rather noticeable in the first few notes of the piece. I am using Sonar, and I changed all the timing parameters I could find, to no avail.
I then switched to use full Kontakt 2.0, as a VST, and the tempo was rock solid (so it's apparently a problem in Kompakt?), only I couldn't play a tuba (not that I could ever play a tuba, but...). Some of the tubas would not sound at all, one had a missing note, one note that wouldn't sound, I mean, so I'm not sure how to work around this.
Any suggestions would be appreciated...