Re: [Avid-L2] timecode offset double-system jam sync

i recall seeing a deva demo at AES some years ago: the main deva guy took the unit, started it recording, then threw it like a frisbee down the carpeted aisle. went and picked it up and played back a flawless recording - nary a hiccup.
b

On Jun 26, 2014, at 1:14 PM, Jay Mahavier jay_mahavier@earthlink.net [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

> I think the problem is that they are using a product from Sound Devices. They set mixer we have worked with for the last few years uses a Sound Devices product. The 788 I believe. I have never had good luck with getting that thing to jam TC. I don't know what the problem is but it sucks. We have jammed our cameras to the Sound Devices machine both by jamming their internal to the SD box and also using Clock-Its. And it's always all over the place. Anywhere from 2 to 12 frames on any given take, but it bounces around. Usually about 5 frames off.
>
> On the other hand, on those occasions that our regular guy is not available, we have used a couple of other people who use Deva recorders and those things are solid on the TC. When I get my audio from a Deva box it's about a quarter of the clips that I usually end up perf-slipping 1 perf. And of those about a quarter get slipped 2 perts. But 3 perf slips are rare if the audio is from a Deva box.
>
> So all I can say is avoid the gear from Sound Devices if you can. Use Deva gear if you can.
>
> Jay
>
> On Jun 25, 2014, at 5:18 PM, Michael Brockington brocking@sfu.ca [Avid-L2] <Avid-L2@yahoogroups.com> wrote:
>
>> I have a test that was shot for me, audio recorded on a sound
>> devices 633, wirelessly transmitted to a F55. Timecode from the 633 was
>> used to jam sync the F55. Timecode on the first audio clip starts at
>> 12:08:50:00.
>>
>> Problem is when I line up the audio waveforms, the timecode on the
>> 633 audio is 15 frames ahead of the camera timecode. This was a test,
>> so there was no great amount of time elapsed between jam-syncing and
>> recording. The total time of the test is about 8 minutes, with the
>> camera and audio recorder starting and stopping twice. Sync appears
>> solid over the 8 minutes, and the 15-frame gap in timecode is consistent
>> from head to tail.
>>
>> Any guesses as to what might be going wrong, here? Doesn't look
>> like an obvious timecode rate mismatch between the 2, for instance.
>>
>> Thanks,
>> --Michael
>>
>>
>> ------------------------------------
>> Posted by: Michael Brockington <brocking@sfu.ca>
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>>
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>> Yahoo Groups Links
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> Yahoo Groups Links
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