[Otto]

Hi Ran,

What frequencies are you concerned about? Measuring higher frequencies gets more difficult due to comb filtering and room reflections, but you can also use the smoothing feature in REW to help determing wholesale problem areas. If you're concerned more about low frequencies, you should be fine.

Overall, there's no reason that REW wouldn't work for your application. It's just taking measurements of your room. You may want to take measurements in various locations around the room, though. Most of us focus on the "sweet spot", while a few have taken steps to determine averages from different seating positions. I think the averaging approach would be useful, especially if you are working to address the overall response of the room from different points of view -- whether it be the performers themselves, or the throngs of fans!