Omnimic adjustments – Dayton Audio OmniMic V2 Precision Measurement System User Manual
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OmniMic Adjustments
The accuracy of each individual OmniMic is enhanced in software to account for frequency sensitivity
variations as determined during the calibration process applied at manufacture. Calibration
information for OmniMic may have been provided in one of two ways. Calibration data for Version 1
OmniMics (small USB connector on the back of microphone body) has been provided in coded form
via a 6 character code printed a label on the microphone.
Calibration data for Version 2 OmniMics (normal sized USB connector on back of microphone body)
can be downloaded from
according to the serial number that is printed
on the microphone. The file (which has an extension type ".omm") should be saved onto a folder on
any computer that the microphone will be used with. Some Version 1 OmniMics will have calibration
files, which can be downloaded from the site for mics having serial numbers (rather than 6 character
codes).
Calibration Codes:
Each version 1 OmniMic is provided with a 6 character code (2 digits followed by 2 letters, then 2
more digits). The code characterizes the frequency response shape of the microphone as compared
to a precision laboratory reference microphone, and is used by the OmniMic software program to
correct during measurement.
To enter the code for your particular OmniMic into the program, select "Config > Mic ID" from the
menu at the top of the screen, select "Version 1" microphone and select the 6 characters using the
dropdown controls. Then click on "Apply".
Calibration Files:
For Version 2 OmniMics and recalibrated Version 1 OmniMics, you can download the ".omm"
calibration file as described above and then select "Config > Mic ID" from the menu at the top of the
screen and then select "Version 2" microphone. Click the button showing the yellow folder and