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Re: MS-stereo and figure-8 mics

Subject: Re: MS-stereo and figure-8 mics
From: "oystercoveau" oystercoveau
Date: Fri Jan 1, 2010 3:16 pm ((PST))

Hi Rob,

Ah, I forgot about the phase reversal - that will kill the idea because the 
phantom power will also be reversed if done by just switching the +/- mic 
leads. Had the NT5s had battery power then it might have worked. I guess if the 
FR2 had more than  2 channels I could have recorded everything separately and 
then just MS processed in the DAW. I wonder if I could save the left+centre to 
one channel and the right+centre to the other channel and then extract the 
centre in later processing?

I live on a 22 acre farm surrounded by bush, so the location is very quiet. 
Plans are to record animals sounds around the area - frogs in the dams, various 
birds raiding our organic blueberries, wallabies and paddy melons munching 
outside the bedroom window etc (sadly we have not heard any Devils fighting for 
many years). So plenty of chance for quiet ambience and also focused recording 
- I'm thinking of also putting the AT4022 into a parabola.


> Hi Keith--
> Welcome to the list.
> Sometimes everyone does overlook the most elegant solutions. I think 
> there may be a few challenges in your design but that doesn't mean it 
> can't be done. With a 2 channel recorder, you need to get the 
> capsules really close together, sum the signals from the mics with 
> one signal inverted and figure out how to power both mics from 
> phantom. Hopefully one of the several excellent mic engineers who 
> read the list will elaborate.
> You can get the flexibility of M-S in post with any stereo array by 
> using a pair of M-S "Matrix" plugs in your post chain, one to convert 
> the L/R stereo to M-S (insert effects plugs here) then another to 
> convert the M-S signal back to L/R stereo. Tom Erbe's free, +Matrix 
> plugs seem to work with very good transparency.
> As for M-S and other mic options, it would be helpful to know whether 
> you are going to be wanting recordings of ambience in quiet locations 
> or mostly concentrating on louder sounds like robust animal calls and 
> effects?  Rob D.
> --

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