most recent 30 from http://socialsounddesign.com 2013-05-21T06:17:07Z http://socialsounddesign.com/feeds/question/821 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://socialsounddesign.com/questions/821/timecode-irregularity-post Sharpy 2010-05-02T10:35:08Z 2010-05-03T05:57:03Z

<p>So the editor of this period drama says to me last week, the sync is out, and also commented that the 2nd unit recordist was as much as 5 frames out of sync.... now first of all let's says there's a 2 frame offset.. that still leaves 3 frames adrift.</p> <p>I use the ambient lockit boxes on arri d21 cams, the master clock however is a ambient acc501... so I tune the lockit boxes to the 501.... half way thorugh the day I re-jam and at most the difference is around 0.04 - 0.25 of a frame out.</p> <p>My mixer's box is a denecke and I jam this too, however it does not have a timecode out so I cannot check the diffence.</p> <p>So with such tight sync between all devices, basiclly less than a frame how is it possible that the editors, bless them, are saying the sync is out by more than 3 frames in some cases?</p> <p>Later on they told us, doesn't matter if it's out, it's out.... I wonder do they really know what timecode is and are they syncing it in post correctly?</p> <p>I use time of day free run, 25fr, 48khz non dp. </p> <p>I wonder if the problem could be with the mixer's fostex recorder as this is the only mixer to have a setting where you set the frequency to 48048 but it gets stamped at 48k, making the playback of the recorded audio 0.1% slower?</p> <p>The 2nd unit mixer uses the same Fostex dv824</p> <p>Any comments?</p> <p>Sharpy</p>

http://socialsounddesign.com/questions/821/timecode-irregularity-post/825#825 NoiseJockey 2010-05-02T17:25:26Z 2010-05-02T17:25:26Z

<p>Just to clarify: Is the offset <strong>consistent</strong> or does the sync drift more and more <strong>over time</strong>? In my (admittedly limited) experience, consistent timecode offsets of 1-2 frames even with top-notch kit isn't uncommon...but it's pretty easy to fix. Drifting sync over time could absolutely signify a mismatch in sample rate that you yourself diagnosed, or someone's sync box or internal clock not set to match drop vs. non-drop. How much post will complain or be willing to fix it depends on how consistent the problems are - if it's all over the place, they're right to have conniption fits.</p> <p>Colin's got a lot of experience doing production audio, he might be able to chime in with more knowledge.</p>