SVF vs. EQ (in: DSP and Plugin Devel…)
By: jacopoeftilo
22 Apr 22:15
State-variable filters are a specific type of filters achieved with integrators and a feedback loop. You can use them to make an EQ as you suggested, but you can also use other filter derivations that allow for more modes (shelvings, peaks, notches and such) without having to sum the direct path too. That sum is baked into the different modes’ transfer functions coefficients.
This usually makes the signal path simpler and gives more flexibility on the overall structure.
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