You can also use your own omnidirectional measurement microphone with a calibration.
To do so, you will need to convert your calibration file so our measurement software can import it.
Calibration files are usually supplied in formats like .cal or .txt
Open up this file with any text editor and remove anything that is not the values for Frequency Response and Magnitude.
You also don't need any title, description and ending texts in your file, so make sure they are deleted.
Once there are only the values for FR and Magnitude left, save this file as a .txt file and our measurement software will be able to read it.
Text file before editing: Text file after editing: