Press Finish or Cancel to turn off the calibration signal when done.

Adjust the replay volume, AV processor volume (preferred) or the Sweep Level (if connected directly to an equaliser, subwoofer or amplifier) to obtain the desired SPL reading on your personal SPL meter. Generally this will be 75 db.

Next, only if not using a USB microphone, adjust the Input Volume either using the REW Input Volume control or your audio interface or OS audio level controls so the input level is between -12 and -30 dBFS. If you are using a mic preamp its level control may need to be adjusted. Note that the level meter is heavily filtered to make it easier to read, it will react slowly to changes in volume setting so allow time for it to settle.

If the input meter reading is very low and does not increase when the calibration signal is playing or when the input volume is adjusted check that the correct Input Channel has been selected, that the correct input is selected in the interface's mixer or OS audio controls and that the cabling is correctly connected.