Posted by Richard Crowley on 08/27/07 16:52

"Rick Merrill" wrote ...
>I am feeding from a audio board/console only designed for a *line* output
>not a mic output.
>
> The video camera is only designed for an external *mic* input with AGC on
> (and does not have a line input nor AGC off).
>
> The wire from the audio board to the camera external audio input is about
> 24 feet long and is unshielded.
>
> We experience noise on the camera that 'breaths'.
>
> What approach would you suggest?

There are many kinds of "noise", and without a better
description, we are only guessing here. If the "noise"
is hum, then it is likely a result of picking up power-
mains interference through your unshielded cable.

Always use a proper shielded cable for all audio
connections (except power amp to speaker, where
it is not necessary).

Advisable to use some kind of adapter on your
camcorder to handle line level. Such as one of...
http://www.equipmentemporium.com/videoaudio.htm

Looks like a good tutorial on interfacing audio to
camcorders...
http://www.equipmentemporium.com/audiohi8.htm

I have no experience with this vendor so I cannot
recommend them. Just linking to their web pages
FYI.

If you want to wire a cable yourself....
http://www.rcrowley.com/CamAdapt.htm
And if you want to build your own pad...
http://www.uneeda-audio.com/pads/

The "pumping" is the primary effect of using equipment
with AGC that cannot be disabled. There is nothing
practical you can do about this except to record the
sound on somthing without AGC.

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