Posted by Richard Crowley on 10/02/05 13:49

blackburst wrote ...
>>From Sony DSR-45 manual (a deck which plays/records both DV
> & DVCAM), page 101:
>
> "There are two modes for audio recording: Lock mode and Unlock mode.
> In Lock mode, the sampling frequencies of audio and video are
> synchronized. In Unlock mode, which the consumer DV format adopts, the
> two sampling frequencies are independent. The lock mode maintains high
> compatibility with the higher formats (DVCAM) and is more effective
> than the unlock mode in digital processing and smooth transition
> during
> audio editing."
>
> The accompanying chart lists DVCAM as Lock mode and DV as Unlock mode.

No dispute about what "locked" vs. "unlocked" means.

The confusion seems to be that we're assuming that "unlocked"
implies "audio drift" which it does not. Anyone can prove this
by simply playing back any DV tape.

Note that your quote only speaks of "smooth transiton during
audio editing" as a benefit of "locked". No mention of drift.
In practice I have never encountered "unsmooth transitions"
during editing DV shots, and I've never heard of anyone here
who experienced such a thing either.

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