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Re: Re: mosquitoes

Subject: Re: Re: mosquitoes
From: Lang Elliott <>
Date: Wed, 06 Nov 2002 08:55:52 -0500
I have a question for all the tech heads:

I want to experiment with some 4-channel recording using a special
"quad-SASS" setup, however I do not have a four channel field recorder. In
the short run, I'd like to try doing this using my two Sony TCD-D10 Pro DAT
recorders, each having two channels.

Has anyone tried this? If I record with both recorders, I could coordinate
them by making a broadband "tick" at the beginning by tapping two coins
together at a point equidistant from the two mike setups. Later, when the
two stereo recordings are inputted into my computer (using direct digital
S/PDIF transfer), I could slide the two stereo tracks to exactly overlap th=
e
waveforms of the introductory "tick". This should coordinate the four
tracks, at least at the beginning of the recording.

My question concerns drift.

For instance, if I record for ten minutes straight, is it likely that the
two recordings would drift in the time domain due to slight differences in
sampling rates? If this happens, it could render the technique useless.

How does a DAT recorder generate sampling rate? Would two DAT recoders of
the same make and model have absolutely identical sampling rates, or would
there be some inherent variation, however small? If so, then would this
variation be enough to cause significant drift between the two recorders
over a 5-10 minute timespan?

Has anyone tried this? I think I remember someone posting a note about this
some months ago.

Lang


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