Howtosignalprocessing
Is biquad filter IIr?
Description. A biquad filter is a form of infinite-impulse response (IIR) filter where the numerator and denominator are split into a series of second-order sections connected by gain blocks.
Why biquad filter?
It has very excellent low frequency performance, and limitations in the high frequencies that have to be worked around, but most importantly frequency and Q coefficients are separate and easy to change for dynamic filtering. It also make a great low frequency sine wave generator.
