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Pull up conversion to resolve sync issue

494 Views 4 Replies Latest reply: Mar 31, 2013 4:55 PM by PF Bungie RSS
PF Bungie Level 1 Level 1 (0 points)
Currently Being Moderated
Mar 26, 2013 3:28 PM



I have a sync problem on a feature film I am working on. It's a musical. I recorded the songs before the shoot in Logic Pro and produced BWF rough mixes at 48k/16 bit.  During the film edit there seems to have been a pull down conversion because the film audio now drifts ahead of my original multi-tracks. A colleague has tested the required pull up in Pro Tools  (it's NTSC to Film) and this put the audio perfectly back in sync. I don't have PT.


Is it possible to load the multis into STP and do a pull up conversion and then drop them back into Logic? I am new to STP. From what I've read you can pull up/down within a project but it doesn't export the pull up/down. I don't know how but I believe i could do a time stretch - I'm not keen on this as I understand it will introduce audio artefacts. And from what I've read there's no preset for timestretch so I'd have to do key in the % for every file (one song has over 80 tracks of audio!)


(just in case you're wondering.... for complicated underscoring reasons I need to sycn the multis rather than mix the tracks out of sync and do the pull up of the mixes at the end)



Logic Pro, Mac OS X (10.7.5), Composer, sound designer, performer
  • Studio X Level 7 Level 7 (26,835 points)
    Currently Being Moderated
    Mar 29, 2013 3:22 PM (in response to PF Bungie)

    Perhaps if you described the issue more directly we could help.


    What format is the video? codec, framerate?


    What format is the audio?


    What program are you working in?


    What are the sequence settings?



  • Studio X Level 7 Level 7 (26,835 points)
    Currently Being Moderated
    Mar 31, 2013 1:11 PM (in response to PF Bungie)

    It could simply be a NonDropFrame to DropFrame time code issue - ie the difference between the true 24 fps of film and the 23.98 of video running at "24p"


    If this is the case, one of you is NDF and the other is DF. Descide who is in control and conform to that frame rate.






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