Hi all, Since I've upgraded to 8.3, the desktop playout has been choppy. It's as if I'm applying a 2 frame strobe. Output from AJA IO Express is good. Any ideas? PC, latest AJA drivers, correct quicktime version, playout in full quality, 1080i project. Thanks.

Jonathan

A couple of more clues: 1) RAM performance is fine on both offending systems [Z400 and Dell T5600] where 8.3 was installed. 2) In addition to said problem, I was also getting more errors that stop playback and say "Your attached hardware is reporting an unexpected frame rate. (etc)...." The AJA settings are correct and are the same they have been all these years. 3) When I disable the AJA I/O hardware within Avid, it looks and plays fine. This indicates that it could be an issue with the AJA. Along with downgrading to 8.2.2., I downgraded AJA drivers and that seems to have fixed the issue. 

Still more tests to be done.