ARDOUR::DSP::LowPass Class Reference

#include <dsp_filter.h>

Public Member Functions
	LowPass (double samplerate, float freq)
void	proc (float *data, const uint32_t n_samples)
void	ctrl (float *data, const float val, const uint32_t n_samples)
void	set_cutoff (float freq)
void	reset ()

Private Attributes
float	_rate
float	_z
float	_a

Detailed Description

1st order Low Pass filter

Definition at line 184 of file dsp_filter.h.

Constructor & Destructor Documentation

LowPass()

ARDOUR::DSP::LowPass::LowPass	(	double	samplerate,
		float	freq
	)

instantiate a LPF

Parameters

samplerate	samplerate
freq	cut-off frequency

Member Function Documentation

ctrl()

void ARDOUR::DSP::LowPass::ctrl	(	float *	data,
		const float	val,
		const uint32_t	n_samples
	)

filter control data

This is useful for parameter smoothing.

Parameters

data	pointer to control-data array
val	target value
n_samples	array length

proc()

void ARDOUR::DSP::LowPass::proc	(	float *	data,
		const uint32_t	n_samples
	)

process audio data

Parameters

data	pointer to audio-data
n_samples	number of samples to process

reset()

void ARDOUR::DSP::LowPass::reset ( )

inline

reset filter state

Definition at line 213 of file dsp_filter.h.

set_cutoff()

void ARDOUR::DSP::LowPass::set_cutoff

(

float

freq

)

update filter cut-off frequency

Parameters

freq	cut-off frequency

Member Data Documentation

_a

float ARDOUR::DSP::LowPass::_a

private

Definition at line 217 of file dsp_filter.h.

_rate

float ARDOUR::DSP::LowPass::_rate

private

Definition at line 215 of file dsp_filter.h.

_z

float ARDOUR::DSP::LowPass::_z

private

Definition at line 216 of file dsp_filter.h.

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The documentation for this class was generated from the following file:

• dsp_filter.h