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So clearly both programs are using different methods of calculating the shape of the filter even though they both are using "Frequency" "Gain" and "Q".
Yes. I’m sure brucek will be along eventually with the mathematical formulas, but basically there is no universal standard for filter Q. It’s different from one equalizer to the next, and one would have to assume, one equalizing program to the next.

To give you an example, here are graphs from three popular parametric EQs. All show the electrical response of filters set for 1/3-octave, which typically translates to ~4.3-4.5Q

Text Line Pattern Design Parallel

Behringer DSP1124


Text Line Plot Pattern Design

Velodyne SMS-1


Text Line Plot Pattern Design

Behringer FBQ2496


Regards,
Wayne

 

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... or if there is a way to add the USM-810 to the list that would be great too :) (I just noticed that the 'supported devices' have quite a few limitations on various parameters (TMREQ only allows +6 db gain, SMS-1 only goes to 120 hz, etc.)
That's because REW is programmed for the built-in limitations and parameters of those equalizers. What good would it do for REW to show a +10 gain for the TMREQ if it won't do that? :)

Regards,
Wayne

 
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