sst::filters::ResonanceWarp Namespace Reference

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. More...

Enumerations
enum	Saturator { SAT_TANH = 0, SAT_SOFT }
enum	nls_coeffs {   nls_a1 = 0, nls_a2, nls_b0, nls_b1,   nls_b2, n_nls_coeff }
enum	dlf_state {   nls_z1, nls_z2, nls_z3, nls_z4,   nls_z5, nls_z6, nls_z7, nls_z8 }

Functions
template<typename TuningProvider >
void	makeCoefficients (FilterCoefficientMaker< TuningProvider > *cm, float freq, float reso, int type, float sampleRate, TuningProvider *provider)
template<FilterSubType subtype>
__m128	process (QuadFilterUnitState *__restrict f, __m128 input)

Detailed Description

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.

A lot of code here is duplicated from NonlinearFeedback.cpp, perhaps in future they could be merged, but for the time being they're separate and nothing is shared.

Enumeration Type Documentation

Saturator

enum Saturator

Enumerator
SAT_TANH
SAT_SOFT

nls_coeffs

enum nls_coeffs

Enumerator
nls_a1
nls_a2
nls_b0
nls_b1
nls_b2
n_nls_coeff

dlf_state

enum dlf_state

Enumerator
nls_z1
nls_z2
nls_z3
nls_z4
nls_z5
nls_z6
nls_z7
nls_z8

Function Documentation

makeCoefficients()

void sst::filters::ResonanceWarp::makeCoefficients	(	FilterCoefficientMaker< TuningProvider > *	cm,
		float	freq,
		float	reso,
		int	type,
		float	sampleRate,
		TuningProvider *	provider
	)

References sst::filters::TriPoleFilter::ResWaveshaper::alpha, C, sst::filters::utilities::DSP::fastcos(), sst::filters::utilities::DSP::fastsin(), FilterCoefficientMaker< TuningProvider >::FromDirect(), sst::filters::fut_resonancewarp_bp, sst::filters::fut_resonancewarp_hp, sst::filters::fut_resonancewarp_lp, sst::filters::fut_resonancewarp_n, sst::filters::utilities::limit_range(), sst::filters::n_cm_coeffs, nls_a1, nls_a2, nls_b0, nls_b1, and nls_b2.

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

process()

__m128 sst::filters::ResonanceWarp::process	(	QuadFilterUnitState *__restrict	f,
		__m128	input
	)

References A, n_nls_coeff, nls_a1, nls_a2, nls_b0, nls_b1, nls_b2, nls_z1, and nls_z2.