There's no need to ask if a soundcard calibration file is valid or not, since the validation should be in the form of a measurement of the loopback cable with the soundcard calibration file in place. The result of that measurement should be a perfectly flat line (if the soundcard calibration file is correct). This is because the cable has a perfect response, and the poor response of the soundcard is nullified by the calibration file you created.anyone else have any additional thoughts?
It's fine. You forgot to run the Calibrate routine after you set the REW input level.What gives?