I’m trying to use biquad~ without the filtergraph~ (so I can cotrol it with a midi controller) by inputing the minimum and maximum coefficients I get from the list of coefficients coming out from filtergraph~’s left outlet, in biquad~’s 3rd, 4th, 5th and 6th inlets, through a zmap object (so I can scale the controller’s values).
The result I get though, is not at all the same as if I use filtergraph. Am I doing something wrong?
The coefficients for biquad~ are interdependent, and they are calculated by filtergraph~ (or filtercoeff~) based on the filter type, gain, frequency, and Q you provide. So you should use your MIDI controllers to control those parameters, and feed those to filtergraph~ or filtercoeff~. To avoid clicks, you’ll probably want to interpolate between changes using line~ or number~, as shown in this example.