At 6:57 AM -0500 3/1/06, Marc Myers wrote:
<snip>
> you are better off
>recording audio on manual using the line input and controlling the sound
>with a good quality preamp like the Soundcraft or Beachtec products.
>These portable preamps also offer phantom power, a real advantage.
>>
Hi Marc--
I've also been surprised by the poor noise performance of some of the
Sony camcorder mic pres-- especially with the older, VX-2000 model.
Yet, the engineers at Sony built high quality into their very
inexpensive HiMD audio recorders showing there are factors beyond
price paid. I've been surprised at both good and poor results with
Panasonic and JVC camcorders so I'm not not ready to make
generalizations about pre quality being better with certain brand
names. The specs on the newer model Beachtek preamp I was looking at
the other day seemed quite noisy, no better than -100dB signal to
noise as I recall. I believe the most popular Beachtec unit (for XLR
balanced->unbalanced stereo miniplug applications) uses the ~1.7
volts from the camcorder's power in plug (PIP)-- a tall order in
delivering adequate, steady power. We have about six of these which
we are now replacing with Rolls BP-244 units. If one has phantom
mics with low self noise, using an Art Phantom II or Rolls PB244 for
phantom portable powering, one should be able to obtain quality
matching that of all but the most expensive portable pres. That's
where I'd start if trying coax better audio performance out of one's
camcorder-- but, as usual, one must invest first in low noise mics,
about 14dBA self noise might be a good target. Rob D
>
>>
>> Is it possible to record high quality sound from the
>> newer 16-bit digital video cameras?
>>
>> I recorded this with a Panasonic DVX-100A using the
>> stock microphone. The audio is uncompressed, exported
>> from Final Cut Pro.
>>
>> http://www.jake-richardson.com/videotest.htm
>>
>> Jake r.
> >
> >
--
Rob Danielson
Film Department
University of Wisconsin-Milwaukee
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