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#474116 09/23/02 10:34 PM
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When recording with an A-B setup (two spaced omnis), how far apart should they be?
I've heard figures quoted anywhere from 6" (15cm) to 10 feet (3m). I suppose it depends on the appearant size of the source - 20 cm might be fine for close-micing an acoustic guitar, but a little too tight for an orchestra. And 3m spacing on that acoustic guitar, well, that's not close micing anymore...
Any other thoughts? What other things come into play as the spacing varies?

#474117 09/23/02 11:06 PM
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I beleive it should be a 3-to-1 ratio.

Distance between mics A-B should be three times distance to source.


miroslav - miroslavmusic.com

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#474118 09/23/02 11:15 PM
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Miroslav,

Not quite. You're on the right track with the 3:1 rule, but it doesn't manifest itself with omnis like that.

Wayne,

Two pages to read:

http://www.dpamicrophones.com/eng_pub/MicUni/122.html

and

http://www.musicplayer.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=001354#000003

Both of these have to do with the spacing of omnis for A-B mic setups.

Nika.

#474119 09/24/02 03:03 AM
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Hmmm...?

I checked a bit further...

"Professional Microphone Techniques" by Huber & Williams

Spaced Onidirectional Microphones
Quote:
Common spacings are from 2-10 feet on either side of the centerline. The spacing is determined by the width of the sound source and by the mic pair's distance from that source. A general rule is that each mic should be placed one-third to one-half the distance from the centerline to the outer edge of the sound stage.
So Nika...seems like there really is no specific distance...but I'm sure you've have some prefered "numbers" based on your hands-on experience with this type of mic setup.

I don't really use it.


miroslav - miroslavmusic.com

"Just because it happened to you, it doesn't mean it's important."

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