=C2=A0
[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
From: Bernie Krause <>
To:
Sent: Thu, August 26, 2010 7:51:14 AM
Subject: Re: [Nature Recordists] Re: Surround Sound / Wildlife Recordings
Four 4060s aligned in a tetrahedral pattern will provide the basis for
ambisonic surround that can be delivered by anything from 3 to over
150 channels. And, yes, the surround provided by an MKH 30 and two 40s
facing opposite directions (used by Martyn, Chris Watson, and a few
others) provides a wonderful double MS result that can likewise be re-
programmed in an ambisonic configuration. The beauty of the double MS
configuration is that only three channels are needed.
Bernie
On Aug 26, 2010, at 6:48 AM, Martyn Stewart wrote:
> I actually had a chance to use the DPA surround setup on a project
> and was very impressed with them. I'm told they are the same
> capsules as the 4060's. I use normally 2 MKH 40 back to back with 1
> MKH-30 effectively.
>
> Martyn
>
> Martyn Stewart
> .........................................
> www.naturesound.org
> www.soundofcritters.com
> .........................................
> 425-898-0462
>
>
> Sent from my iPad
>
> On Aug 26, 2010, at 6:19 AM, clay <> wrote:
>
>> On Thu, Aug 26, 2010 at 8:29 AM, corticalsongs <=
>> >wrote:
>>
>>>
>>>
>>>
>>>> Any thoughts on using surround sound for wildlife? Are the mic
>>>> specs
>>> suited to wildlife?
>>>
>>> I would say that all you need is 4 mics to start. As far as I can
>>> tell the
>>> fancy surround mics are all pretty noisy right now, perhaps thier
>>> intended
>>> use was the concert hall or foley stage. If you are recording a
>>> jungle at
>>> night, they would be fine, but as Dan pointed out, they are
>>> probably too
>>> noisy for most quiet places in North America.
>>>
>>> David
>>>
>>> __._,_.
>>>
>>
>>
>> I was thinking three mics would work, if one were Figure-8, plus
>> front and
>> rear facing cardiods?
>>
>>
>> There is something called a Tetramic that might be useful, but still
>> relatively noisy.
>>
>> http://www.core-sound.com/TetraMic/1.php
>>
>> clay
>>
>
>
> ------------------------------------
>
> "While a picture is worth a thousand words, a
> sound is worth a thousand pictures." R. Murray Schafer via Bernie
> Krause
> Yahoo! Groups Links
>
>
>
>
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