[NewMusic] Core Sound ambisonic mics

[barry threw]

You actually need 3 *bi-directional* mics and one omni, and they are  
as close to coincident as possible (without fancy delay processing).   
But, that is only for 3rd order (preserving height information).

For second order you can need 2 bi and one omni; that will give you  
accurate recording of a 2D sound field.

For stereo, all you need is one bi and one omni.  But thats M/S (kind  
of) and we all knew about it.

b

On Nov 7, 2007, at 9:45 AM, Tom Duff wrote:

>
> Just noticed this for recording weenies:
>
> http://www.core-sound.com/TetraMic/1.php
>
> It's an ambisonic transducer (tetrahedral coincident array of cardioid
> mics) for under $1000.  Looks great.  Len Moskowitz (Core Sound)  
> usually
> makes first-rate stuff for the price.
>
> Ambisonic recording is extremely cool.  By using 4 directional mics  
> evenly
> spaced in 3-D, you can, by appropriate mixing, simulate arbitrary
> coincident microphone arrays.  If you use a 4-channel recorder, you  
> can
> even change miking decisions after the fact.
>
> -- 
> Tom Duff.  Hwanon ferigeath ge faette scyldas?
> _______________________________________________
> Bay Area New Music Discussion Group
> NewMusic at music.mills.edu
> http://music.mills.edu/mailman/listinfo/newmusic

Barry Threw
Media Art and Technology


San Francisco, CA	Work: 857-544-3967
Email: bthrew at gmail.com
IM: captogreadmore (AIM)
http:/www.barrythrew.com