I tried the PAA3 and I currently use Fuzzmeasure. I find the sweep of PAA3 takes too long and very susceptable to ambient noise. Fuzzmeasure allows 1/3 octave to 1/48 octave smoothing with RT60 calcutalions at 1/3 octave. The sweep time and freq range is also adjustable. The curves from each measurement can be superimposed on the same grap so you can see the result of each change you do to the room/speaker.
PAA3 is useful in other ways and very portable. But for frequency response curve and reverb measurements, Fuzzmeasure is more precise and informative
PAA3 is useful in other ways and very portable. But for frequency response curve and reverb measurements, Fuzzmeasure is more precise and informative