When working with audio signals a common requirement is to be able to equalise, cut or boost various frequency bands. [...]
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In many instances we need to filter a signal to remove unwanted frequencies. If we use classical filters such as Butterworth, Chebyshev or even Bessel then a phase delay is introduced. This phase delay is itself a function of frequency so that the signal content at one frequency is delayed a different amount to that [...] |
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