Hi Anders,
I am not sure what the best or easiest way is but this is what I did to mak=
e pairs from ten em172 capsules - the capsules came with leads already sold=
ered on.
Number each capsule with a marker to keep them straight.
Make a test fixture - stereo cable with screw terminals to easily swap out =
capsules.
Record a stereo recording of each EM172 capsule beside a single reference c=
apsule. In this case for the reference capsule I used an EM158 I had lying =
around.
Open each recording in your audio editing software (I used Adobe Audition 1=
.5), run a frequency analysis of a section of each, copy the data to the cl=
ipboard, and paste it into a spreadsheet (I used MS Excel.) You may need to=
adjust the frequency analysis resolution to limit frequency divisions to a=
manageable number of data points. I do not know if "copy to clipboard" is =
a common feature with other editing or analysis software.
In the spreadsheet, subtract the left (reference) channel from the right (E=
M172) of each set to find the differences in frequency response.
Plot the points to make a graph showing the differences from reference of a=
ll ten capsules, and use that to decide the best pairing.
It will be interesting to hear how others have done it.
John Hartog
oregonsoundscapes.com
--- In "kronseth" <> =
wrote:
>
> Hi everyone!
> Sorry if/that this question has been raised probably infinite times.. So =
I have received a batch of electrets, both omnis and cardioids.
> The ones I have bought before have come in matched pairs, but this time I=
=C2=B4ll have to do it myself.
> I understand there a quite a few ways of doing it. Anyone has a preferred=
method?
>
> Best
> -Anders
>
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