Originally Posted by donktard
I am about to post graphs but not sure which smoothing to use for left and right and which frequency range?
You got it right...for sub graphs, no smoothing and 20hz-300hz. You can change the lower limit to your sub's -3dB point though so we can see how low you can go.
Also, whats the procedure nowadays for waterfall graphs? If I recall correctly, someone around here mentioned that there should be 40 dB difference from top to bottom of graph at SPL we measured. So, if we measure at 85dB, top would be 85, bottom 45, and also time range 450 ms?
I believe that is correct.
EDIT: I suppose also that measurement should be taken about 40dB or more above noise floor?
Don't think it matters as long as you are showing a 40dB difference.
Personally, I think the spectrogram is almost a more useful tool for looking at ringing.
I tweaked sub distance today, made significant improvement. I have attached my last measurement. Red line is center channel with final sub tweak and blue line is me adding 4 broadband panels on right side reflection of center channel.
Looks like the traps cleaned it up a bit from 120-160hz for sure, good job there.
I'm not really seeing the "chaos from 100-400hz" you were talking about earlier. Sure, it looks a little ragged over ~150hz, but that's pretty much normal. Once you get above the modal region, you should apply smoothing to better represent what you can actually hear. Either use Variable or 1/6th above the sub frequencies.
I would expect to see the bass response a bit more flat higher up though. Where is your crossover set? It seem like you are dropping significantly from 40-100hz, then the response starts to slowly rise again to 300hz. Can we see the same measurement but with Audyssey off?
I hope Feri or Gary J don't see how hot you're running your subs! You may incur their wrath.
EDIT: Since we are now getting into graph interpretation, it may be best to move this discussion to the REW thread or your own thread.