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Re: modified ambient recording setup AT 3032

Subject: Re: modified ambient recording setup AT 3032
From: "Scott Fraser" scottbfraser
Date: Fri Nov 30, 2007 8:02 am ((PST))
<<1) how would i go about testing each mic to make sure they match? i
was planning on pumping out some white noise and recording each one
from the same perspective. then maybe checking it on a graphic eq
program in protools? is there anything else i can do to test their

Pink noise is better & more appropriate for this sort of broadband
frequency response testing, since it contains equal energy per
octave. Mount the mics as physically close together as possible, &
record the pink noise. Play back the stereo file in mono with the
polarity inverted on one channel only. Perfectly matched mics should
perfectly cancel, except for the very highest frequencies, where the
slightly offset physical location means a slight phase offset.
Everything you hear which isn't cancelled is the frequency response
difference between the two mics.

Scott Fraser

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