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Re: Telinga Stereo-DAT compared with Twin Science?

Subject: Re: Telinga Stereo-DAT compared with Twin Science?
From: "Klas Strandberg" klasstrandberg
Date: Thu Apr 12, 2007 8:57 am ((PDT))
At 16:46 2007-04-12, you wrote:
>Hi Klas,
>
>Need some help...a few questions...
>
>--- Klas Strandberg <> escribi=F3:
>
> > But people don't bother to do this experimenting and learning.
> > Instead, they learn all about 0,0001 % difference in ways to compress
> > or not compress... or something....
> > (Sorry, I couldn't resist... )
> >
> > >How does the Stereo-DAT compare with the Twin Science after a
> > >conversion to mono?
> >
> > Never connect two stereo channels with one-another!
> > Use one of them.
> >
> > When you wrote that one channel was distorted and the other not, I
> > was sure that you had used a Twin Science! That kind of result would
> > have been typical.
> > But if you use the Stereo DATmic, how could it become that way?
> > Were the input level settings different?
> >
> >
>
>
>On Stereo DAT mic; if its on the "bottom" of the dish. It is possible that=
 you
>get distortion in just one channel, if the signals are coming from
>the opposite
>extreme side?

I guess "everything" is possible, but I have never experienced that
phenomena, not that I know of. You say "extreme" - I don't really
know what that would be?

Using parabols, I suffer from two phenomena, 1/ one is that some bird
sounds always sound distorted and 2/ phaseshift.
Nightingales, for example, have some sounds which always sound "hard"
and "unpleasant" to my ear, but I am not sure if this is an effect of
some unpredictable mess of parabol-distortions, or not.  I don't
think it is, because you can hear the same "unpleasing" sounds also
with open mikes, if they are close enough. I have "perfect"
open-mikes recordings of nightingales, still you feel the need of
some kind of compression!

Blackbirds sound very pleasant and nice when you hear them around
here. But it is hard to record them that way. Using a parabol, there
is a "harshness" added.
So last year I had a Blackbird sitting on a pole every morning around
four. And I put the most linear and "true-to-life" microphone that I
know of, the MPS1, on a rod, only two meters away from the blackbird.
I expected the most "state-of-the-Art" recording.
But he sounds like he has a really sore throat.
It is no distortion, I am sure of that. He sounds that way, when you
are close. Only ten meters away, you don't her it that way.

Every "on-location" sound recordist know that you sometimes get phase
problems. When applause, for example, sound like "in a tube".
That has happened to me a few times using a parabol and Stereo
Datmic, when there has been a road nearby and "all over" sounds from
the tires of the cars. These tires sound like "in a tube".

The parabolic comb effect at high frequencies are always there, but
usually it doen't cause big problems.

There is a picture at telinga.com explaining the theory on the Stereo
DATmic. A recording, too.

Was that an answer to your question??

Klas.



>If pointing to the bird you get a mono signal, In the background, do you g=
et
>some signals inverted 9lets say the one on the extreme right or left)? Som=
e
>sort of XY on the background and mono signal on the front?
>
>If the mic is out of the "bottom" of the dish (tip of the mic out of the d=
ish,
>out as much as you can). Stereo signals on the sides should not come inver=
ted?
>
>Can you explain us more about Stereo mics?
>
>Tony Celis
>
>
>
>Antonio Celis-Murillo
>
>__________________________________________________
>Correo Yahoo!
>Espacio para todos tus mensajes, antivirus y antispam =A1gratis!
>Reg=EDstrate ya - http://correo.yahoo.com.mx/
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>

Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email: 
website: www.telinga.com







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