Can the JUCE IIR Peaking Filter match the Logic Channel EQ?


#1

I’m trying to match the sound and functionality of Logic’s Channel EQ…specifically the parametric peaking type, using JUCE’s IIRFilter, but it doesn’t seem like the Q matches. Is there some kind of conversion involved? How can I get it to match?

Thanks.


#2

The Logic EQ is probably using a variable Q, and some algorithm to make the digital filter frequency response match the analog prototype one… Have a look for articles about Orfanidis, Massberg and MZTi peak filters for more information.