Posted by RS on 11/16/05 22:05

Doc wrote:
> "Doc" <docsavage20@xhotmail.com> wrote in message
> news:49oef.448$wf.242@newsread3.news.atl.earthlink.net...
>
>>You may have seen my other thread re: OOS audio problems. To recap, when
>>recording to h/d via Firewire passthrough from analog VCR through a Sony
>>Dig8 cam, the audio gets out of sync, it gets progressively worse the
>>farther into the program you get.
>>
>>I've made the discovery that this *doesn't* happen if instead of coming in
>>from a VCR, I play a tape recorded in Dig8 format directly from the cam
>>through the Firewire cable. No OOS audio. It also doesn't happen when
>>recording directly from VCR to the h/d in mjpeg format via the composite
>>analog inputs.
>
>
> New info, I've found that it happens when playing an analog tape through the
> cam. This model plays analog tapes as well as Dig8. Everything is fine when
> viewing on the camera's onboard LCD screen.
>
> So, it appears there's something about the analog/digital conversion process
> and the resulting output from the cam's Firewire port that's causing this.
> Hmmm...
>
> So, the question is, what could be different about the output from a tape
> made in Dig8 mode and an analog tape that's played out from the cam or a
> passthrough signal?
>
>

Have you checked the actual sampling rate of the audio you captured on
the pass through? Check its properties. Perhaps there is a clue there.

If you record onto a tape first, any audio you record is going to come
back out at the rate the camcorder records at, likely 48Khz, but
maybe on the passthrough the audio gets no such treatment.

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