Timecode issue

Recorded a sequence using both internal camera (Sony A7sii) sound with timecode recorded to track 2 from a Tentacle sync unit. At the same time recorded sound from a different mike attached to a Zoom F10 locked to the same timecode.

When autosyncing these tracks in DR15 the sync between the sound tracks is off by 12 frames, regardless if I autosync using timecode or wavepattern.

In the attached screenshot it looks as if the 2 soundtracks are out of sync by 12 frames but track 2 has to be manually offset by 12 frames for the playback to be in sync. Audio 1 is the sound recorded to the A7sii and Audio 2 is the sound recorded by the Zoom F10

Any suggestions anyone as to whats causing this bizarre effect?

dr_tcode.JPG (119.08 KiB) Viewed 662 times

Often DSLRs’ video tracks are slightly out of sync with their own internal audio tracks. LTC into the audio track is OK, but with a DSLR, LTC can’t really be trusted without a slate.


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Yes thats as maybe but look at the waveform in the picture.. clearly out of sync but it has to be to get a clean playback