Hi there,

I am currently working on Avid Adrenaline MC 3.1.3 on Mac. 

Project is NTSC 23.98 35mm 3 perf

MXF picture files

OMF audio files (WAV)

The client want the audio recorded and imported as 48khz, 24 bit WAV files.

Today I discovered that on all my takes longer than a minute the audio is drifting out of sync, however it is drifting earlier NOT later which would be expected. 

On a 2.39min clip at approx 2.22mins the audio is early by 4 frames. 

I have tried restamping the audio in it's native state to 48.048 but it makes no difference, and I have also tried importing via later software (3.5.4) but still no difference.

If anyone has an inkling whatsoever as to why this is happening I would be very grateful for some advice.

Many thanks

If you have anything connected to the FW ports on your CPU besides storage, disconnect it and see if the drift goes away.

Make sure audio settings are correctly set for the pullup/pulldown. Also, audio would be easiler since it playing back faster at 24fps (recorded) than the slowed down picture at 23.976. Once a file is recorded, you cannot stampe it as 48048 and expect it to slow down, it needed to be recorded that way on set.

For a file already recorded as 48kHz, you need to stamp it as 47952.

Michael