ConstA function that applies the biquad filter (given a set of coefficients) to an input signal.
Create band-pass filter coefficients for Biquad.
Create high-shelf filter coefficients for Biquad.
Create high-pass filter coefficients for Biquad.
Create low-shelf filter coefficients for Biquad.
Create low-pass filter coefficients for Biquad.
Create notch filter coefficients for Biquad.
Create peak filter coefficients for Biquad.
Create a biquad filter.
(This filter maintains internal state across calls, allowing it to process audio signals over time.)