Class daisysp::LadderFilter¶

ClassList > daisysp > LadderFilter

#include <ladder.h>

Public Types¶

Type	Name
enum	FilterMode

Public Functions¶

Type	Name
void	Init (float sample_rate)
	LadderFilter () = default
float	Process (float in)
void	ProcessBlock (float * buf, size_t size)
void	SetFilterMode (FilterMode mode)
void	SetFreq (float freq)
void	SetInputDrive (float drv)
void	SetPassbandGain (float pbg)
void	SetRes (float res)
	~LadderFilter () = default

Detailed Description¶

4-pole ladder filter model with selectable filter type (LP/BP/HP 12 or 24 dB/oct), drive, passband gain compensation, and stable self-oscillation.

Public Types Documentation¶

enum FilterMode¶

enum daisysp::LadderFilter::FilterMode {
    LP24,
    LP12,
    BP24,
    BP12,
    HP24,
    HP12
};

Public Functions Documentation¶

function Init¶

void daisysp::LadderFilter::Init (
    float sample_rate
)

Initializes the ladder filter module.

function LadderFilter¶

daisysp::LadderFilter::LadderFilter () = default

function Process¶

float daisysp::LadderFilter::Process (
    float in
)

Process single sample

function ProcessBlock¶

void daisysp::LadderFilter::ProcessBlock (
    float * buf,
    size_t size
)

Process mono buffer/block of samples in place

function SetFilterMode¶

inline void daisysp::LadderFilter::SetFilterMode (
    FilterMode mode
)

Sets the filter mode/response Defaults to classic lowpass 24dB/oct

function SetFreq¶

void daisysp::LadderFilter::SetFreq (
    float freq
)

Sets the cutoff frequency of the filter. Units of hz, valid in range 5 - ~nyquist (samp_rate / 2) Internally clamped to this range.

function SetInputDrive¶

void daisysp::LadderFilter::SetInputDrive (
    float drv
)

Sets drive of the input stage into the tanh clipper Valid in range 0 - 4.0

function SetPassbandGain¶

void daisysp::LadderFilter::SetPassbandGain (
    float pbg
)

Set "passband gain" compensation factor to mitigate loss of energy in passband at higher resonance values. Drive and passband gain have a dependent relationship. Valid in range 0 - 0.5 Internally clamped to this range.

function SetRes¶

void daisysp::LadderFilter::SetRes (
    float res
)

Sets the resonance of the filter. Filter will stably self oscillate at higher values. Valid in range 0 - 1.8 Internally clamped to this range.

function ~LadderFilter¶

daisysp::LadderFilter::~LadderFilter () = default

The documentation for this class was generated from the following file external-docs/DaisySP/Source/Filters/ladder.h