[Jeff Largent]

Couple of clarifications here… Digital audio does in fact have a frame rate in the sense that the sample rate is divisable by the frame rate. In other words, there is a relationship between your sample rate and your frame rate… change one and you change the other.

As far as Drop vrs Non-drop goes… this should only effect the placement or offset of the audio to the picture. It should not cause drift because both NDF and DF have the same frame rate 29.97 for NTSC video.

I suspect the problem lies with the bounce in ProTools. If you just bounce to disk with your system running on internal sync you are no longer synchronizing to the rate established by the picture… in effect, you are pulling up. Even if you set PT for pull down. You must use a Sync I/O clocking to an appropriate external source to force PT to clock to that rate all the time… even when bouncing to disk. When you bounce to QTM, PT clocks to the rate of the QTM file… which would explain why QTM audio tracks are working.