Originally Posted by |Tch0rT|
I'm not 100% sure but isn't one of the benefits of the UMIK-1 is you don't need a separate SPL meter for mic calibration for REW?
As far as I know, that is supposed to be true of both mics. That said, I am not sure calibration is working reliably in either as last I checked, there was back and forth between revisions of REW and calibration files for these mics. I have read people saying that UMIK-1 is working that way but the same promise existed for the UMM-6.
Here is the good news though: you do not need to calibrate the levels at all.
It doesn't matter if the frequency response graph is at say, 80 dB SPL and it should be 85 db SPL. You are not acting on that numerical level. What you are acting on is the shape of that graph and relative values. If you have a peak that is 20 dB higher at 42 Hz than 100 Hz, that is what you care about. What its absolute level is, is not material. It is like looking at a basket of apples: your goal is to have all of them be the same size. What each one of them weighs, is not important.
Let me know if this is not clear and I will post an example.