Which measurement did you take the rt60 from. I cant find one that matches.
Mix position, baselline, both left and right speakers.
The other two (Left only and right only) are equally invalid:
eric-best-faulty-rt60-L-graph.jpg
eric-best-faulty-rt60-R-graph.jpg
I uploaded the same file to one of my servers, so you can download it and compare to the original. It might be data corruption, but I don't think so, as the waterfalls you posted look equally invalid. You can find it here:
http://spartanew.digistar.cl/SayersForu ... eline.mdat
The spl meter we used to calibrate was the one with the Omnimic system.
As far as I know, Dayton does not manufacturer hand-held sound level meters. They only make mics and test software. I'd suggest that you get a real SPL meter, such as an Extech or Galaxy, or some such, and calibrate again. Even an app for your cellphone, such as AudioTools, would at least give you a semi-reasonable estimate of the real SPL levels in your room. Not accurate, of course, but good enough to do a basic check. Try that now, to see what you get. I suspect that you are not really getting the levels that REW thinks you are getting.
Here's a spectrogram from your right speaker:
eric-best-faulty-SP-R-graph.jpg
That's just meaningless mush. Here's what a typical spectrogram looks like for a partially treated room:
typical-SP-2.jpg
Here's what the low-end waterfall for that same room looks like:
typica.WF.17..500-2.jpg
And here's the full spectrum waterfall for it:
typica.WF.20..20k.jpg
And here's the RT60 graph (same room):
typica.RT.20..20k.jpg
All of the above are similar to what I'd expect to see in your data. Not the way it looks in your graphs. I chose that MDAT file at random from among the large number I have, but that's typical of most of them. Your data is way, way noisy.
Before doing anything else, you need to figure out what's wrong here, and fix it! You can't make room treatment and tuning decisions based on flaky, suspect data.
- Stuart -