In SigmaStudio I am using a second order general parametric EQ filter.
I am setting a f0 = 500 Hz, a dBboost of -12 and a Q of 5.
I then plug in the probe and the stimulus on the filter and check the frequency response.
The result does not match my Matlab implementation of the filter. I also compare the frequency response of the filter with the same coming from another DSP tool and it also does not match the curve I see in SigmaStudio. But it does match my matlab implementation.
I know SigmaStudio is probably defining the Q differently than other tools, according to this:
However, none of the the Q = 5 or the Q' = 5 seem to give me what the other tools give me for a Q = 5.
I can more or less match the response of the filter in SigmaStudio if I set the Q = 2.5 and Q' = 1.25.
Why is this and how can I match the Q in a SigmaStudio filter to those that other tools give me?