At 10:51 PM -0700 8/30/10, Luiz do Carmo wrote:
>
>Hi,
>
>I am a sound professional based in Brazil. At
>the moment I am working in a film
>in which the action takes place in a rural environment surrounded by a den=
se
>forest. The easy way to work around our low budget enterprise would be the
>utilization of some (quite some=C2=8A) stereo ambience recordings I have c=
ollected
>over the years, but I lost all of them in a =C2=8Ccomputer accident=C2=B9 =
=C2=AD which is a
>story longer than what I believe would suit the present occasion.
>
>The good part of this tragic story is that it forced me to do something I =
was
>procrastinating for quite a while, since I have being inclined to start
>producing 4 channel recordings for such purpose,
>but the lack of available time
>and money kept delaying my plans.
>
>After gathering (googled) information around and lately here in this list =
I
>ended up with two types of mic arrays that I suppose would work fine in a =
Message: 5.
Subject: 1
>Dolby Digital final mix, which requires discrete channels: An IRT Cross or=
a
>Double M/S.
>
>To fit my budget, 4 AT4021 mics in an IRT Cross setup would do it. The onl=
y
>problem in using the ATs would be the fact that
>these mics would only be useful
>=C2=AD for the kind of work I do: post production and location sound =C2=
=AD for ambience
>recordings (I have Oktava MK-012s for sfx), as they are not suited for
>production sound/dialogues, which are almost always recorded with shotguns=
,
>principally in outdoors situations.
>
>My first question is: Do the sound of the mid
>mics on a Double M/S take part in
>the overall sound, or the resulting 4 channels
>only carry the audio information
>captured by the figure-8?
>
>I ask that because if the sound of the figure-8
>mic is what actually is heard in
>the 4 channel image, I could use whatever cardioids or supercardioid =C2=
=AD for
>example, a MKH-416 or a pair of Oktava MK-012, which I already have =C2=AD=
without
>altering the quality of the figure-8 mic. I could add to this that with su=
ch
>setup I could have a mic array already set for directional plus surround
>recording, which would suit perfectly for documentary film situations, bes=
ides
>the adition of easiness represented by a lot less gear to carry around.
>
>(The second question is about recorders and I rather leave it for another
>thread).
>
>I would like to thank all the list members for sharing your knowledge, whi=
ch
>already helped me a lot and specially, for the
>present matter, Rob Danielson for
>his microphone chart.
>
>Regards,
>Luis
Hi Luis -
A belated welcome to the list! Sorry to read about your lost recordings.
If only there was a web site with controlled
recordings where you could compare the impacts of
a number of surround array options! Without
samples, there are many opinions and different
goals to wade through without reference. It would
be well worth your time to find and listen to
actual recordings made in settings similar to
those you record in. To aid partially in this, I
can suggest a small work-sharing group that
focuses on surround recording. You can ask the
people in this group for links to samples. One of
the recordists uses a surround array that is a
variation of an IRT Cross. (Anyone who wishes to
have their email address added, contact me, off
list.)
As you are on a tighter budget, I would
definitely look for field samples made with these
array types:
Double M-S Arrays
Back to Back SASS-B Arrays (People are making DIY SASS-B's and variations)
Spaced Rear Arrays (usually a stereo array in
front with wide spaced omni's in the rear)
Spaced Front & Back Arrays (Usually two stereo
arrays spaced according to habitat(s) and
acoustics)
Decca Tree (Greg Weddig comes to mind)
Holophone (possibly not too hard to DIY)
Harder to DIY arrays:
Ambisonic Arrays
Sphere Arrays (Double-MS on a sphere boundary
like Schoeps KFM 360 or two stereo spheres back
to back to with a sound-blocking panel in between)
I would not base opinion only on recording
samples that were made inside or of loud subjects
. If the "natural ambiences" you want to capture
become very "quiet" at times, you will want to
only use very low-noise mics.
As for your recorder question, "Tascam DR680" is
one answer to investigate. Rob D.
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