`functional_lfilter.Rd`

Perform an IIR filter by evaluating difference equation.

`functional_lfilter(waveform, a_coeffs, b_coeffs, clamp = TRUE)`

- waveform
(Tensor): audio waveform of dimension of

`(..., time)`

. Must be normalized to -1 to 1.- a_coeffs
(Tensor): denominator coefficients of difference equation of dimension of

`(n_order + 1)`

. Lower delays coefficients are first, e.g.`[a0, a1, a2, ...]`

. Must be same size as b_coeffs (pad with 0's as necessary).- b_coeffs
(Tensor): numerator coefficients of difference equation of dimension of

`(n_order + 1)`

. Lower delays coefficients are first, e.g.`[b0, b1, b2, ...]`

. Must be same size as a_coeffs (pad with 0's as necessary).- clamp
(bool, optional): If

`TRUE`

, clamp the output signal to be in the range [-1, 1] (Default:`TRUE`

)

`tensor`

: Waveform with dimension of `(..., time)`

.