Problem with that, Kevin, is the pick-up elements need to be as close
together as possible to avoid phase cancellation...particularly in the
higher frequencies. With the normal piggy-back mount we use for the
MKH30/40 combo, the elements are set at less than an inch from each other.
The loss at the high end due to phase cancellation is measurable above
17kHz. which also happens to approach the upper limits of the mic system so
that is not a particular problem. If they're placed further apart that
that, real (and noticable) problems will ensue.
Every system has it's drawbacks and I should point out that this is one of
the main critiques with this type of system.
All best,
Bernie
>A question on MS recording. As none of the directional mics really
>magnify the sound in front (they just cut the sound coming from the
>sides) would it work to combine M - an omni mounted in a parabola, and S
>- the standard side mic. Seems this might bring one right up close the
>subject while still maintaining a sense of ambience.
>
>Kevin J. Colver
>114 North Clark Lane
>Elk Ridge, UT 84651
>801-423-1810
>
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Wild Sanctuary, Inc.
P. O. Box 536
Glen Ellen, California 95442-0536
Tel: (707) 996-6677
Fax: (707) 996-0280
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>From Tue Mar 8 18:22:15 2005
Message: 5
Date: Sun, 10 Mar 2002 18:19:00 -0500
From: Walter Knapp <>
Subject: Re: M/S Stereo decoding - Mac Software
Wild Sanctuary wrote:
>
> Problem with that, Kevin, is the pick-up elements need to be as close
> together as possible to avoid phase cancellation...particularly in the
> higher frequencies. With the normal piggy-back mount we use for the
> MKH30/40 combo, the elements are set at less than an inch from each other.
> The loss at the high end due to phase cancellation is measurable above
> 17kHz. which also happens to approach the upper limits of the mic system so
> that is not a particular problem. If they're placed further apart that
> that, real (and noticable) problems will ensue.
You could mount a complete M/S combo in the focus of a Parabolic and see
what happened.
> Every system has it's drawbacks and I should point out that this is one of
> the main critiques with this type of system.
At least it's fairly predictable compared to the phase problems you can
have in some other setups.
Walt
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