I then loaded both files into a spreadsheet in different worksheets and subtracted the calibrated SPL column from the un-calibrated SPL calibrated column creating a new delta column in a 3rd worksheet.I edited the text files to remove the file and column header information leaving only the 3 measurement numeric columns (frequency, SPL and phase).I used the "File/Export Measurement as Text" option to do a text dump of the calibrated and un-calibrated files.The derived ECM8000 calibration SPL measurement(BLUE) tracks pretty close to the GREEN baseline, but the phase is a bit off at the ends. I just tried it using a Cross Spectrum Labs calibrated UMIK-1's measurement (GREEN) as the baseline and an un-calibrated ECM8000 measurement(RED).
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