A99 with XLR interface means that's really a PRO V-SLT cam!

To Francis:

You are correct. Just wanted to clarify the common misconception that Pluraleyes fixes drift. It only lines up the two files and syncs them. It does not re-sample anything to account for different recording speeds.

I was referring to recording with separate, non connected devices. In this instance one can see a loss of a frame in less than 10 min.