[Wayne A. Pflughaupt]

Welcome to the Forum!

I don’t know if REW can help you compensate for an inadequate mixing room, but it can let you know what your frequency response is; maybe that will help.

Most of us aren’t too familiar with recording gear, but I’ll take a stab at this anyway. I’ll make some of our pro-audio members aware of your thread, so maybe they can chime in and correct me where needed.

Basically all you need for REW is a USB soundcard with line in and line out connections. If your Motu has those connections (and I’m sure it does), you should be in good shape. I’m sure balanced ins and outs will work, if that’s all it has (I can’t tell from your post if the Motu is serving as your soundcard, or if you have another one).

The only problem with using your mic, preamp and anything else in front of the soundcard is that you need calibration files for each piece. REW can create one for the pre-amp (and Motu, if needed) in the same manner that it would for the soundcard (see the REW help files), but for the mic you’ll have to have a frequency response plot to create a .txt calibration file.

If you are able to use all the gear you mentioned, then the SPL meter you have will work fine. If not, you’ll need the RS SPL meter. We have calibration files for it available at this site. It’s only good up to about 7kHz, but that should be plenty high to help you figure out where your mixes are breaking down (I expect that the problems you’re having are not in the high frequencies anyway). As an alternative, the Galaxy meter is good even higher – you can find some posts on it in our SPL Meters – Mics – Calibration area:

http://www.hometheatershack.com/foru...s-calibration/

Regards,
Wayne