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Re: Surround Sound / Wildlife Recordings

Subject: Re: Surround Sound / Wildlife Recordings
From: "Marcus Buick" mbuick
Date: Thu Aug 26, 2010 3:30 pm ((PDT))
       [Four 4060s aligned in a tetrahedral pattern will provide the basis =
for
ambisonic surround  ~Bernie]


My greatest respect goes out to one of (in not the) finest nature recordist=

ever.  Please allow me to contest you on this one, Bernie.

>From my understanding of ambisonics in studying Michael Gerzon=E2=80=99s
http://www.audiosignal.co.uk/Gerzon%20archive.html work though the years is=
 that
the four capsules in the tetrahedral array are not only aligned symmetrical=
ly,
but electronically as well.  This electronic calibration gives the four
diaphragms four distinct pickup patterns:

1).  Top/Bottom figure-8
2).  Left/Right figure-8
3).  Front/Rear figure-8
4).  Omni for pressure

The 4060 is an omni mic, and without the proper electronics, four omni=E2=
=80=99s that
close to one another will create and image rife with time-alignment issues,=

phantom reflections, and an overall muddiness that is not akin to the
point-source algorithm Michael so beautifully describes.  I own eight 4060=
=E2=80=99s,
and would gladly reconfigure four of them for ambisonic use, if only I coul=
d
figure out how to do so.

~Marcus




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