Struct SinglePoleFilter 

pub struct SinglePoleFilter { /* private fields */ }

The cheapest possible IIR filter: a single-pole recursive low-pass or high-pass filter (Steven W. Smith, Ch. 19, Eq. 19-2 / 19-3), needing only one or two multiplies per sample. Coefficients are designed from a decay factor x (see crate::filter_design::single_pole_decay_from_cutoff / crate::filter_design::single_pole_decay_from_time_constant).

Implementations

impl SinglePoleFilter

pub fn lowpass(decay: f32) -> Self

Creates a single-pole low-pass filter from decay factor x (0.0..1.0); larger x means slower decay (a lower cutoff frequency).

pub fn highpass(decay: f32) -> Self

Creates a single-pole high-pass filter from the same decay factor x used by SinglePoleFilter::lowpass.

pub fn process(&mut self, x: f32) -> f32

Processes a single input sample and returns the filtered output.

pub fn reset(&mut self)

Resets the filter’s delay state to zero.

Trait Implementations

impl Clone for SinglePoleFilter

fn clone(&self) -> SinglePoleFilter

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for SinglePoleFilter

impl Debug for SinglePoleFilter

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SinglePoleFilter

fn default() -> SinglePoleFilter

Returns the “default value” for a type.