Thanks for your reply,
These clips are actually finished commercials for historical reel. Most of the spots are
Mac 10.6.8
2.2.26 GHz Quad-Core Intel Xeon
16GB Memory
FCP 7.0.3
The source clips are standard def NTSC CCIR601
Uncompressed 10bit 4 2 2
720×486 29.97
48kz
and then some are 16bit and some are 24bit
There also are some Pro Res 422HQ mixed in there as well, though not too much.
SEQUENCE SETTINGS
720×486 CCIR 601 NTSC (40:27)
PAR 720×480 DV
Field Dominance Lower(Even)
Editing Timebase 29.97
Compressor Apple ProRes 422HQ
Audio Rate 48
Audio Depth 16
Config Stereo Downmix
You’re right in my assumption that it was the bit depths, but I guess it could be something else as well.
I have a KONA capture card and I’m judging sync on my computer monitors, not my video monitor.
Do you need any other info?