Dutilleux, P.P.DutilleuxHolters, M.M.HoltersDisch, S.S.DischZölzer, U.U.Zölzer2022-03-042022-03-042011https://publica.fraunhofer.de/handle/publica/225596Textbook chapter covering the following topics: *Basic filters: Filter classification in the frequency domain, Canonical filters, State variable filter, Normalization, Allpass-based filters, FIR filters, Convolution; *Equalizers: Shelving filters, Peak filters; *Time-varying filters: Wah-wah filter, Phaser, Time-varying equalizers; *Basic delay structures: FIR comb filter, IIR comb filter, Universal comb filter, Fractional delay lines; *Delay-based audio effects: Vibrato, Flanger, chorus, slapback, echo, Multiband effects, Natural sounding comb filter;en621book article