Has anybody used this? I downloaded it last summer and it is great. Takes awhile to learn, but it seems to be fairly accurate using an old Radio Shack sound meter. There is even a calibration file you can download to make the Radio Shack sound meter perform better than it should. I compared near-field measurements of REW to a Klippell and they are very close. Highly recommend.
It's worth learning if you are into speakers.
It's worth learning if you are into speakers.