Recording - May 2018 - 51

into the right channel. XY and ORTF
were designed around cardioid mics,
angling them at 110°, but they can also
be used with hypercardioids, angled at
90°. And both rely on the mics being
recorded with identical gain settings on
the preamp or interface.
Unfortunately, these days that's not so
easy to do, because most preamps and
interfaces have only coarsely calibrated
gain settings (if they're calibrated at all).
Setting the preamp/interface while the
musician is warming up doesn't really
work, because the sound levels in the two
channels will be different-that's what
makes stereo miking work, after all. And
"matched" microphones aren't always;
for example, the cardioid capsules on my
Oktava MC012s differ in sensitivity by
0.2 dB, while the hypercardioid capsules
differ by 0.25 dB. Even my Neumann
KM 84s differ by 0.3 dB; when I built
my stereo mixer/preamp, I spent a long
afternoon calibrating the level controls in
decibels-a feature not found on commercial preamps/interfaces. (As I found,
exact dB calibration takes a while, and
time is money.)
So getting the channel gains balanced is something of a challenge.
Here's one way to get the balance right
while you're setting up, using the polarity flip.
First, instead of placing the mics in
the XY or ORTF setup right away, lash
them together with some gaff tape (being careful not to cover the vents) and
set them in a clamp, as shown in Fig. 3.
Plug them into two channels of your recording setup and point them at a loud
part of whatever you're recording.
Flip the polarity on one of the mics,
either using a switch on your preamp/
interface or the Flipper described in the
sidebar. If your DAW has a sophisticated monitoring function like the nearly
complete DAW in MOTU's CueMix
software, pan the two signals to the
same side; otherwise, just listen to the
two channels you're using, but configure your monitor setup to combine the
two channels to mono. (Your monitor
controller probably has a mono button.)
Set the level on one channel for a reasonable recording level when the music
is playing; be a little conservative, since
RECORDING May 2018

51


http://www.pearlmanmicrophones.com http://www.clearsonic.com

Table of Contents for the Digital Edition of Recording - May 2018

Contents
Recording - May 2018 - Intro
Recording - May 2018 - Cover1
Recording - May 2018 - Cover2
Recording - May 2018 - 1
Recording - May 2018 - 2
Recording - May 2018 - 3
Recording - May 2018 - 4
Recording - May 2018 - 5
Recording - May 2018 - Contents
Recording - May 2018 - 7
Recording - May 2018 - 8
Recording - May 2018 - 9
Recording - May 2018 - 10
Recording - May 2018 - 11
Recording - May 2018 - 12
Recording - May 2018 - 13
Recording - May 2018 - 14
Recording - May 2018 - 15
Recording - May 2018 - 16
Recording - May 2018 - 17
Recording - May 2018 - 18
Recording - May 2018 - 19
Recording - May 2018 - 20
Recording - May 2018 - 21
Recording - May 2018 - 22
Recording - May 2018 - 23
Recording - May 2018 - 24
Recording - May 2018 - 25
Recording - May 2018 - 26
Recording - May 2018 - 27
Recording - May 2018 - 28
Recording - May 2018 - 29
Recording - May 2018 - 30
Recording - May 2018 - 31
Recording - May 2018 - 32
Recording - May 2018 - 33
Recording - May 2018 - 34
Recording - May 2018 - 35
Recording - May 2018 - 36
Recording - May 2018 - 37
Recording - May 2018 - 38
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Recording - May 2018 - 40
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Recording - May 2018 - 72
Recording - May 2018 - Cover3
Recording - May 2018 - Cover4
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