I just picked up TrueRTA level 4 in my quest to properly EQ my room. The software is rather nice btw! I already have a pair of 10" ID helmholts resonators to "help" tame the 63hz room resonance that I get, and will be using the BFD to take care of the rest from 20-100hz. Here are the "tools" I have at my disposal: *1/3 up to 1/24th octave measurements *pink noise *sine sweeps *sine tones at any frequeny *averaging over X # of measurements *peak hold *quick sweep I will be using the RS spl meter until I get my panasonic mic all done. any advice?