sst::filters Namespace Reference

DSP code for Surge filters. More...

Namespaces
	CutoffWarp
	This namespace contains an adaptation of the filter found at https://ccrma.stanford.edu/~jatin/ComplexNonlinearities/NLFeedback.html with coefficient calculation from https://webaudio.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html.
	detail
	DiodeLadderFilter
	This namespace contains an adaptation of the filter from https://github.com/TheWaveWarden/odin2/blob/master/Source/audio/Filters/DiodeFilter.cpp.
	HalfRate
	K35Filter
	This namespace contains an adaptation of the filter from https://github.com/TheWaveWarden/odin2/blob/master/Source/audio/Filters/Korg35Filter.cpp.
	OBXDFilter
	This namespace contains an adaptation of the filter from https://github.com/reales/OB-Xd/blob/master/Source/Engine/Filter.h.
	ResonanceWarp
	This contains an adaptation of the filter found at https://ccrma.stanford.edu/~jatin/ComplexNonlinearities/NLBiquad.html with coefficient calculation from https://webaudio.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html.
	TriPoleFilter
	This filter is an emulation of the "Threeler" VCF by Ian Fritz (https://ijfritz.byethost4.com/Threeler_board_doc.pdf).
	utilities
	Utility code needed for Surge filters.
	VintageLadder
	This contains various adaptations of the models found at.

Classes
class	FilterCoefficientMaker
	Class for creating filter coefficients. More...
struct	FilterPlotParameters
class	FilterPlotter
struct	QuadFilterUnitState
	State for a filter unit. More...

Typedefs
typedef __m128(*	FilterUnitQFPtr) (QuadFilterUnitState *__restrict, __m128 in)
	Typedef alias for a filter unit processing method. More...

Enumerations
enum	FilterType {   fut_none = 0, fut_lp12, fut_lp24, fut_lpmoog,   fut_hp12, fut_hp24, fut_bp12, fut_notch12,   fut_comb_pos, fut_SNH, fut_vintageladder, fut_obxd_2pole_lp,   fut_obxd_4pole, fut_k35_lp, fut_k35_hp, fut_diode,   fut_cutoffwarp_lp, fut_cutoffwarp_hp, fut_cutoffwarp_n, fut_cutoffwarp_bp,   fut_obxd_2pole_hp, fut_obxd_2pole_n, fut_obxd_2pole_bp, fut_bp24,   fut_notch24, fut_comb_neg, fut_apf, fut_cutoffwarp_ap,   fut_resonancewarp_lp, fut_resonancewarp_hp, fut_resonancewarp_n, fut_resonancewarp_bp,   fut_resonancewarp_ap, fut_tripole, num_filter_types }
	These are the filter types we have to choose from! More...
enum	FilterSubType {   st_Standard = 0, st_Driven = 1, st_Clean = 2, st_Medium = 3,   st_Notch = 0, st_NotchMild = 1, st_lpmoog_6dB = 0, st_lpmoog_12dB = 1,   st_lpmoog_18dB = 2, st_lpmoog_24dB = 3, st_diode_6dB = 0, st_diode_12dB = 1,   st_diode_18dB = 2, st_diode_24dB = 3, st_cutoffwarp_tanh1 = 0, st_cutoffwarp_tanh2 = 1,   st_cutoffwarp_tanh3 = 2, st_cutoffwarp_tanh4 = 3, st_cutoffwarp_softclip1 = 4, st_cutoffwarp_softclip2 = 5,   st_cutoffwarp_softclip3 = 6, st_cutoffwarp_softclip4 = 7, st_cutoffwarp_ojd1 = 8, st_cutoffwarp_ojd2 = 9,   st_cutoffwarp_ojd3 = 10, st_cutoffwarp_ojd4 = 11, st_resonancewarp_tanh1 = 0, st_resonancewarp_tanh2 = 1,   st_resonancewarp_tanh3 = 2, st_resonancewarp_tanh4 = 3, st_resonancewarp_softclip1 = 4, st_resonancewarp_softclip2 = 5,   st_resonancewarp_softclip3 = 6, st_resonancewarp_softclip4 = 7, st_tripole_LLL1 = 0, st_tripole_LHL1 = 1,   st_tripole_HLH1 = 2, st_tripole_HHH1 = 3, st_tripole_LLL2 = 4, st_tripole_LHL2 = 5,   st_tripole_HLH2 = 6, st_tripole_HHH2 = 7, st_tripole_LLL3 = 8, st_tripole_LHL3 = 9,   st_tripole_HLH3 = 10, st_tripole_HHH3 = 11 }
	Sub-types for each filter are defined here. More...
enum	QFUSubtypeMasks : int32_t { UNMASK_SUBTYPE = (1 << 8) - 1, EXTENDED_COMB = 1 << 9 }

Functions
template<typename T >
T	db_to_linear (T in)
float	clipscale (float freq, int subtype)
float	boundFreq (float freq)
double	Map2PoleResonance (double reso, double freq, int subtype)
double	Map2PoleResonance_noboost (double reso, double, int subtype)
double	Map4PoleResonance (double reso, double freq, int subtype)
template<typename T >
T	resoscale (T reso, int subtype)
template<typename T >
T	resoscale4Pole (T reso, int subtype)
FilterUnitQFPtr	GetQFPtrFilterUnit (FilterType type, FilterSubType subtype)
	Returns a filter unit pointer for a given filter type and sub-type. More...
__m128	SVFLP12Aquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	SVFLP24Aquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	SVFHP24Aquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	SVFBP24Aquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	SVFHP12Aquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	SVFBP12Aquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	IIR12Aquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	IIR12Bquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	IIR12WDFquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	IIR12CFCquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	IIR12CFLquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	IIR24CFCquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	IIR24CFLquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	IIR24Bquad (QuadFilterUnitState *__restrict f, __m128 in)
template<FilterSubType subtype>
__m128	LPMOOGquad (QuadFilterUnitState *__restrict f, __m128 in)
__m128	SNHquad (QuadFilterUnitState *__restrict f, __m128 in)
template<int COMB_SIZE>
__m128	COMBquad_SSE2 (QuadFilterUnitState *__restrict f, __m128 in)

Variables
constexpr int	n_cm_coeffs = 8
constexpr float	smooth = 0.2f
const char	filter_type_names [num_filter_types][32]
const char	filter_menu_names [num_filter_types][32]
const char	fut_notch_subtypes [2][32]
const char	fut_comb_subtypes [2][64]
const char	fut_def_subtypes [3][32]
const char	fut_ldr_subtypes [4][32]
const char	fut_vintageladder_subtypes [6][32]
const char	fut_obxd_2p_subtypes [2][32] = {"Standard", "Pushed"}
const char	fut_obxd_4p_subtypes [4][32]
const char	fut_k35_subtypes [5][32]
const float	fut_k35_saturations [5] = {0.0f, 1.0f, 2.0f, 3.0f, 4.0f}
const char	fut_nlf_subtypes [4][32]
const char	fut_nlf_saturators [4][16]
const char	fut_tripole_subtypes [4][32]
const char	fut_tripole_output_stage [3][16]
const int	fut_subcount [num_filter_types]
	The number of sub-types for each filter type. More...
constexpr int	n_filter_registers = 16
	Max number of registers stored in each filter state. More...

Detailed Description

DSP code for Surge filters.

Typedef Documentation

FilterUnitQFPtr

typedef __m128(* FilterUnitQFPtr) (QuadFilterUnitState *__restrict, __m128 in)

Typedef alias for a filter unit processing method.

Enumeration Type Documentation

FilterType

enum FilterType

These are the filter types we have to choose from!

Enumerator
fut_none	Off.
fut_lp12	Lowpass - 12 dB.
fut_lp24	Lowpass - 24 dB.
fut_lpmoog	Lowpass - Legacy Ladder.
fut_hp12	Highpass - 12 dB.
fut_hp24	Highpass - 24 dB.
fut_bp12	Bandpass - 12 dB.
fut_notch12	Notch - 12 dB.
fut_comb_pos	Effect - Comb +.
fut_SNH	Effect - Sample & Hold.
fut_vintageladder	Lowpass - Vintage Ladder.
fut_obxd_2pole_lp	Lowpass - OB-Xd 12 dB.
fut_obxd_4pole	Lowpass - OB-Xd 24 dB.
fut_k35_lp	Lowpass - K35.
fut_k35_hp	Highpass - K35.
fut_diode	Lowpass - Diode Ladder.
fut_cutoffwarp_lp	Lowpass - Cutoff Warp.
fut_cutoffwarp_hp	Higghpass - Cutoff Warp.
fut_cutoffwarp_n	Notch - Cutoff Warp.
fut_cutoffwarp_bp	Bandpass - Cutoff Warp.
fut_obxd_2pole_hp	Highpass - OB-Xd 12 dB.
fut_obxd_2pole_n	Notch - OB-Xd 12 dB.
fut_obxd_2pole_bp	Bandpass - OB-Xd 12 dB.
fut_bp24	Bandpass - 24 dB.
fut_notch24	Notch - 24 dB.
fut_comb_neg	Effect - Comb -.
fut_apf	Effect - Allpass.
fut_cutoffwarp_ap	Effect - Cutoff Warp Allpass.
fut_resonancewarp_lp	Lowpass - Resonance Warp.
fut_resonancewarp_hp	Highpass - Resonance Warp.
fut_resonancewarp_n	Notch - Resonance Warp.
fut_resonancewarp_bp	Bandpass - Resonance Warp.
fut_resonancewarp_ap	Effect - Resonance Warp Allpass.
fut_tripole	Multi - Tri-pole.
num_filter_types

FilterSubType

enum FilterSubType

Sub-types for each filter are defined here.

Enumerator
st_Standard	Standard (SVF)
st_Driven	Driven.
st_Clean	Clean.
st_Medium	(Unused)
st_Notch	Standard.
st_NotchMild	Mild.
st_lpmoog_6dB	Legacy Ladder - 6 dB.
st_lpmoog_12dB	Legacy Ladder - 12 dB.
st_lpmoog_18dB	Legacy Ladder - 18 dB.
st_lpmoog_24dB	Legacy Ladder - 24 dB.
st_diode_6dB	Diode Ladder - 6 dB.
st_diode_12dB	Diode Ladder - 12 dB.
st_diode_18dB	Diode Ladder - 18 dB.
st_diode_24dB	Diode Ladder - 24 dB.
st_cutoffwarp_tanh1	Cutoff Warp - 1 Stage tanh.
st_cutoffwarp_tanh2	Cutoff Warp - 2 Stages tanh.
st_cutoffwarp_tanh3	Cutoff Warp - 3 Stages tanh.
st_cutoffwarp_tanh4	Cutoff Warp - 4 Stages tanh.
st_cutoffwarp_softclip1	Cutoff Warp - 1 Stage Soft Clip.
st_cutoffwarp_softclip2	Cutoff Warp - 2 Stages Soft Clip.
st_cutoffwarp_softclip3	Cutoff Warp - 3 Stages Soft Clip.
st_cutoffwarp_softclip4	Cutoff Warp - 4 Stages Soft Clip.
st_cutoffwarp_ojd1	Cutoff Warp - 1 Stage OJD.
st_cutoffwarp_ojd2	Cutoff Warp - 2 Stages OJD.
st_cutoffwarp_ojd3	Cutoff Warp - 3 Stages OJD.
st_cutoffwarp_ojd4	Cutoff Warp - 4 Stages OJD.
st_resonancewarp_tanh1	Resonance Warp - 1 Stage tanh.
st_resonancewarp_tanh2	Resonance Warp - 2 Stages tanh.
st_resonancewarp_tanh3	Resonance Warp - 3 Stages tanh.
st_resonancewarp_tanh4	Resonance Warp - 4 Stages tanh.
st_resonancewarp_softclip1	Resonance Warp - 1 Stage Soft Clip.
st_resonancewarp_softclip2	Resonance Warp - 2 Stages Soft Clip.
st_resonancewarp_softclip3	Resonance Warp - 3 Stages Soft Clip.
st_resonancewarp_softclip4	Resonance Warp - 4 Stages Soft Clip.
st_tripole_LLL1	Low -> Low -> Low, first.
st_tripole_LHL1	Low -> High -> Low, first.
st_tripole_HLH1	High -> Low -> High, first.
st_tripole_HHH1	High -> High -> High, first.
st_tripole_LLL2	Low -> Low -> Low, second.
st_tripole_LHL2	Low -> High -> Low, second.
st_tripole_HLH2	High -> Low -> High, second.
st_tripole_HHH2	High -> High -> High, second.
st_tripole_LLL3	Low -> Low -> Low, third.
st_tripole_LHL3	Low -> High -> Low, third.
st_tripole_HLH3	High -> Low -> High, third.
st_tripole_HHH3	High -> High -> High, third.

QFUSubtypeMasks

enum QFUSubtypeMasks : int32_t

Enumerator
UNMASK_SUBTYPE
EXTENDED_COMB

Function Documentation

db_to_linear()

T sst::filters::db_to_linear

(

T

in

)

Referenced by clipscale().

clipscale()

float sst::filters::clipscale	(	float	freq,
		int	subtype
	)

References db_to_linear(), st_Clean, and st_Driven.

boundFreq()

float sst::filters::boundFreq

(

float

freq

)

Map2PoleResonance()

double sst::filters::Map2PoleResonance	(	double	reso,
		double	freq,
		int	subtype
	)

References sst::filters::utilities::limit_range(), st_Clean, st_Driven, and st_Medium.

Map2PoleResonance_noboost()

double sst::filters::Map2PoleResonance_noboost	(	double	reso,
		double	,
		int	subtype
	)

References sst::filters::utilities::limit_range(), and st_Driven.

Map4PoleResonance()

double sst::filters::Map4PoleResonance	(	double	reso,
		double	freq,
		int	subtype
	)

References sst::filters::utilities::limit_range(), st_Clean, st_Driven, and st_Medium.

resoscale()

T sst::filters::resoscale	(	T	reso,
		int	subtype
	)

References st_Clean, st_Driven, and st_Medium.

resoscale4Pole()

T sst::filters::resoscale4Pole	(	T	reso,
		int	subtype
	)

References st_Clean, st_Driven, and st_Medium.

GetQFPtrFilterUnit()

FilterUnitQFPtr GetQFPtrFilterUnit	(	FilterType	type,
		FilterSubType	subtype
	)

Returns a filter unit pointer for a given filter type and sub-type.

References EXTENDED_COMB, fut_apf, fut_bp12, fut_bp24, fut_comb_neg, fut_comb_pos, fut_cutoffwarp_ap, fut_cutoffwarp_bp, fut_cutoffwarp_hp, fut_cutoffwarp_lp, fut_cutoffwarp_n, fut_diode, fut_hp12, fut_hp24, fut_k35_hp, fut_k35_lp, fut_lp12, fut_lp24, fut_lpmoog, fut_none, fut_notch12, fut_notch24, fut_obxd_2pole_bp, fut_obxd_2pole_hp, fut_obxd_2pole_lp, fut_obxd_2pole_n, fut_obxd_4pole, fut_resonancewarp_ap, fut_resonancewarp_bp, fut_resonancewarp_hp, fut_resonancewarp_lp, fut_resonancewarp_n, fut_SNH, fut_tripole, fut_vintageladder, IIR12Bquad(), IIR12CFCquad(), IIR24Bquad(), IIR24CFCquad(), num_filter_types, sst::filters::VintageLadder::RK::process(), sst::filters::VintageLadder::Huov::process(), sst::filters::OBXDFilter::process_2_pole(), sst::filters::OBXDFilter::process_4_pole(), sst::filters::K35Filter::process_hp(), sst::filters::K35Filter::process_lp(), SNHquad(), st_Clean, st_cutoffwarp_ojd1, st_cutoffwarp_ojd2, st_cutoffwarp_ojd3, st_cutoffwarp_ojd4, st_cutoffwarp_softclip1, st_cutoffwarp_softclip2, st_cutoffwarp_softclip3, st_cutoffwarp_softclip4, st_cutoffwarp_tanh1, st_cutoffwarp_tanh2, st_cutoffwarp_tanh3, st_cutoffwarp_tanh4, st_diode_12dB, st_diode_18dB, st_diode_24dB, st_diode_6dB, st_Driven, st_lpmoog_12dB, st_lpmoog_18dB, st_lpmoog_24dB, st_lpmoog_6dB, st_resonancewarp_softclip1, st_resonancewarp_softclip2, st_resonancewarp_softclip3, st_resonancewarp_softclip4, st_resonancewarp_tanh1, st_resonancewarp_tanh2, st_resonancewarp_tanh3, st_resonancewarp_tanh4, st_Standard, st_tripole_HHH1, st_tripole_HHH2, st_tripole_HHH3, st_tripole_HLH1, st_tripole_HLH2, st_tripole_HLH3, st_tripole_LHL1, st_tripole_LHL2, st_tripole_LHL3, st_tripole_LLL1, st_tripole_LLL2, st_tripole_LLL3, SVFBP12Aquad(), SVFBP24Aquad(), SVFHP12Aquad(), SVFHP24Aquad(), SVFLP12Aquad(), and SVFLP24Aquad().

SVFLP12Aquad()

__m128 sst::filters::SVFLP12Aquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

Referenced by GetQFPtrFilterUnit().

SVFLP24Aquad()

__m128 sst::filters::SVFLP24Aquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

Referenced by GetQFPtrFilterUnit().

SVFHP24Aquad()

__m128 sst::filters::SVFHP24Aquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

Referenced by GetQFPtrFilterUnit().

SVFBP24Aquad()

__m128 sst::filters::SVFBP24Aquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

Referenced by GetQFPtrFilterUnit().

SVFHP12Aquad()

__m128 sst::filters::SVFHP12Aquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

Referenced by GetQFPtrFilterUnit().

SVFBP12Aquad()

__m128 sst::filters::SVFBP12Aquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

Referenced by GetQFPtrFilterUnit().

IIR12Aquad()

__m128 sst::filters::IIR12Aquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

IIR12Bquad()

__m128 sst::filters::IIR12Bquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

Referenced by GetQFPtrFilterUnit().

IIR12WDFquad()

__m128 sst::filters::IIR12WDFquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

References sst::filters::OBXDFilter::s1, and sst::filters::OBXDFilter::s2.

IIR12CFCquad()

__m128 sst::filters::IIR12CFCquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

References sst::filters::OBXDFilter::s1, and sst::filters::OBXDFilter::s2.

Referenced by GetQFPtrFilterUnit().

IIR12CFLquad()

__m128 sst::filters::IIR12CFLquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

References sst::filters::utilities::m128_mask_absval, sst::filters::OBXDFilter::s1, and sst::filters::OBXDFilter::s2.

IIR24CFCquad()

__m128 sst::filters::IIR24CFCquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

References sst::filters::OBXDFilter::s1, sst::filters::OBXDFilter::s2, sst::filters::OBXDFilter::s3, and sst::filters::OBXDFilter::s4.

Referenced by GetQFPtrFilterUnit().

IIR24CFLquad()

__m128 sst::filters::IIR24CFLquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

References sst::filters::utilities::m128_mask_absval, sst::filters::OBXDFilter::s1, sst::filters::OBXDFilter::s2, sst::filters::OBXDFilter::s3, and sst::filters::OBXDFilter::s4.

IIR24Bquad()

__m128 sst::filters::IIR24Bquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

Referenced by GetQFPtrFilterUnit().

LPMOOGquad()

__m128 sst::filters::LPMOOGquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

References sst::filters::utilities::softclip8_ps().

SNHquad()

__m128 sst::filters::SNHquad	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

References sst::filters::utilities::softclip_ps().

Referenced by GetQFPtrFilterUnit().

COMBquad_SSE2()

__m128 sst::filters::COMBquad_SSE2	(	QuadFilterUnitState *__restrict	f,
		__m128	in
	)

References SincTable::FIRipol_M, SincTable::FIRipol_N, SincTable::FIRoffset, sst::filters::utilities::softclip_ps(), and sst::filters::utilities::sum_ps_to_ss().

Variable Documentation

n_cm_coeffs

constexpr int n_cm_coeffs = 8

constexpr

Referenced by FilterCoefficientMaker< TuningProvider >::FromDirect(), sst::filters::DiodeLadderFilter::makeCoefficients(), sst::filters::OBXDFilter::makeCoefficients(), sst::filters::ResonanceWarp::makeCoefficients(), sst::filters::VintageLadder::RK::makeCoefficients(), sst::filters::CutoffWarp::makeCoefficients(), sst::filters::TriPoleFilter::makeCoefficients(), sst::filters::VintageLadder::Huov::makeCoefficients(), sst::filters::DiodeLadderFilter::process(), sst::filters::K35Filter::processCoeffs(), FilterCoefficientMaker< TuningProvider >::Reset(), FilterCoefficientMaker< TuningProvider >::updateCoefficients(), and FilterCoefficientMaker< TuningProvider >::updateState().

smooth

constexpr float smooth = 0.2f

constexpr

Referenced by FilterCoefficientMaker< TuningProvider >::FromDirect().

filter_type_names

const char filter_type_names[num_filter_types][32]

filter_menu_names

const char filter_menu_names[num_filter_types][32]

fut_notch_subtypes

const char fut_notch_subtypes[2][32]

Initial value:

= {
    "Standard",
    "Mild",
}

fut_comb_subtypes

const char fut_comb_subtypes[2][64]

Initial value:

= {
    "50% Wet",
    "100% Wet",
}

fut_def_subtypes

const char fut_def_subtypes[3][32]

Initial value:

= {
    "Standard",
    "Driven",
    "Clean",
}

fut_ldr_subtypes

const char fut_ldr_subtypes[4][32]

Initial value:

= {
    "6 dB",
    "12 dB",
    "18 dB",
    "24 dB",
}

fut_vintageladder_subtypes

const char fut_vintageladder_subtypes[6][32]

Initial value:

= {
    "Type 1",
    "Type 1 Compensated",
    "Type 2",
    "Type 2 Compensated",
}

fut_obxd_2p_subtypes

const char fut_obxd_2p_subtypes[2][32] = {"Standard", "Pushed"}

fut_obxd_4p_subtypes

const char fut_obxd_4p_subtypes[4][32]

Initial value:

= {
    "6 dB",
    "12 dB",
    "18 dB",
    "24 dB",
}

fut_k35_subtypes

const char fut_k35_subtypes[5][32]

Initial value:

= {"No Saturation", "Mild Saturation", "Moderate Saturation",
                                      "Heavy Saturation", "Extreme Saturation"}

fut_k35_saturations

const float fut_k35_saturations[5] = {0.0f, 1.0f, 2.0f, 3.0f, 4.0f}

Referenced by FilterCoefficientMaker< TuningProvider >::MakeCoeffs().

fut_nlf_subtypes

const char fut_nlf_subtypes[4][32]

Initial value:

= {
    "1 Stage",
    "2 Stages",
    "3 Stages",
    "4 Stages",
}

fut_nlf_saturators

const char fut_nlf_saturators[4][16]

Initial value:

= {
    "tanh",
    "Soft Clip",
    "OJD",
    "Sine",
}

fut_tripole_subtypes

const char fut_tripole_subtypes[4][32]

Initial value:

= {
    "Low -> Low -> Low",
    "Low -> High -> Low",
    "High -> Low -> High",
    "High -> High -> High",
}

fut_tripole_output_stage

const char fut_tripole_output_stage[3][16]

Initial value:

{
    "First",
    "Second",
    "Third",
}

fut_subcount

const int fut_subcount[num_filter_types]

The number of sub-types for each filter type.

n_filter_registers

constexpr int n_filter_registers = 16

constexpr

Max number of registers stored in each filter state.