Hi Ajay
here is a an extract from my tech support guy
“I have run a bunch of testing in Edit3 this evening to confirm the status of this audio/video sync problem and attempted to find a fix.
I have confirmed it can happen just going from 1080i25 10-bit to 625i25 8-bit display then back to 1080i25 10-bit display within the one project, simply changing the VIEW | VIDEO PLAYBACK setting.
After operating in SD modes, then switching back to 1080HD, the Kona SDI video output sometimes quickly drifts behind the audio and the canvas video window.
I’ve tried various troubleshooting, from forcing genlock reference, to adjusting the amount of PCI bandwidth to the card, to shutting down FCP and changing hardware modes in the Kona Control Panel, to accessing the Kona with another application then switching back to FCP, to trying both SDI1 and SDI2 hardware outputs, to moving the media off the XSAN, to removing the KONA drivers, rebooting then reinstalling, to creating some media in ProRes NQ (normal Quality) – none of these things resolve the problem once it has happened.
It is a Final Cut Pro-only issue. You can force the problem to occur in a 60-second timeline with just a single clip on it – take that same clip into AJA TV and it stays in sync the whole play.”
some pretty extensive testing, this guy is the best here in australia!
So yes, it was a suprise to all of us, we were sold on the fact that HD playback would not be a problem, we were not happy when we were told that there were known issues, hence the immediate upgrade!
Hope you get it resolved
cheers