Working with the Web Audio API by Reiss Joshua;

Author:Reiss, Joshua;
Language: eng
Format: epub
Publisher: Taylor & Francis Group
Published: 2022-03-15T00:00:00+00:00

Filter definition

Let bm be the feedforward coefficients and an be the feedback coefficients. Then a linear, time-invariant filter is given by the time-domain equation,

By dividing all terms by a0, one can get the current output as a function of previous outputs, and current and previous inputs. So, for instance, a one sample delay is just , and averaging the current input and the last output is .

This can also be represented in the frequency domain. The transfer function of the general IIR filter is given by

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