Spectral Delay Filters

@inproceedings{Vlimki2009SpectralDF,
  title={Spectral Delay Filters},
  author={Vesa V{\"a}lim{\"a}ki and Jonathan S. Abel and Julius Orion Smith},
  year={2009}
}
The implementation of spectral delay using filters comprising a cascade of many low-order all-pass filters and an equalizing filter is discussed. The spectral delay filters have chirplike impulse responses causing a large, frequency-dependent delay that is useful in audio effects processing. An equalizing filter design and a multirate technique that stretches the impulse response of all-pass filters are introduced. 

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