Calibration files, explained

A calibration file is a plain-text list of numbers: one frequency and one dB value per line. It describes how your microphone hears, so Clearroom can subtract the mic's character and measure only your room.

Open one in any text editor and it looks like this:

20.0    -1.6
100.0   -0.2
1000.0   0.0
10000.0  0.9
20000.0 -3.1

Left column: frequency in Hz. Right column: how many dB your mic is off at that frequency. That's the whole file.

Where your mic's file comes from

Most measurement mics are measured one by one at the factory, and the maker keeps your file online:

• miniDSP UMIK-1 · serial-number lookup on miniDSP's site
• miniDSP UMIK-2 · same lookup, on the UMIK-2 page
• Sonarworks measurement mic · Profile ID lookup at Sonarworks
• Dayton Audio EMM-6 · serial lookup in Dayton's calibration tool
• Behringer ECM8000 · no personal file exists

If a file won't read

Clearroom reads all the common vendor formats: miniDSP, Sonarworks, Dayton, REW-style .cal and .txt files, even files written with decimal commas. If a file won't read, it's usually not a calibration file at all: a PDF certificate, a spreadsheet, or a screenshot of one.

Still stuck? Send the file to support@clearroom.studio and we'll make it work.