marvin::dsp::filters::rbj Namespace Reference

Implementations of Robert Brinstow Johnson's RBJ Cookbook formulae. More...

Functions
template<FloatType SampleType>
BiquadCoefficients< SampleType >	lowpass (double sampleRate, SampleType cutoff, SampleType q) noexcept
template<FloatType SampleType>
BiquadCoefficients< SampleType >	highpass (double sampleRate, SampleType cutoff, SampleType q) noexcept
template<FloatType SampleType>
BiquadCoefficients< SampleType >	bandpass (double sampleRate, SampleType centreFrequency, SampleType bandwidth, SampleType peakGain) noexcept
template<FloatType SampleType>
BiquadCoefficients< SampleType >	bandpass (double sampleRate, SampleType centreFrequency, SampleType bandwidth) noexcept
template<FloatType SampleType>
BiquadCoefficients< SampleType >	notch (double sampleRate, SampleType centreFrequency, SampleType bandwidth) noexcept
template<FloatType SampleType>
BiquadCoefficients< SampleType >	allpass (double sampleRate, SampleType cutoff, SampleType q) noexcept
template<FloatType SampleType>
BiquadCoefficients< SampleType >	peak (double sampleRate, SampleType centreFrequency, SampleType bandwidth, SampleType dbGain) noexcept
template<FloatType SampleType>
BiquadCoefficients< SampleType >	lowShelf (double sampleRate, SampleType centreFrequency, SampleType slope, SampleType dbGain) noexcept
template<FloatType SampleType>
BiquadCoefficients< SampleType >	highShelf (double sampleRate, SampleType centreFrequency, SampleType slope, SampleType dbGain) noexcept

Detailed Description

Implementations of Robert Brinstow Johnson's RBJ Cookbook formulae.

Function Documentation

allpass()

template<FloatType SampleType>

BiquadCoefficients< SampleType > marvin::dsp::filters::rbj::allpass ( double sampleRate, SampleType cutoff, SampleType q )

nodiscardnoexcept

An RBJ allpass implementation for use with the Biquad class, based on the formulae from the RBJ Cookbook (https://webaudio.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html)

Parameters

sampleRate	The sample rate to base the calculations off.
cutoff	The centre frequency of the allpass.
q	The resonance of the allpass (0 to 1).

Returns

An instance of BiquadCoefficients populated with the resulting coefficients.

bandpass() [1/2]

template<FloatType SampleType>

BiquadCoefficients< SampleType > marvin::dsp::filters::rbj::bandpass ( double sampleRate, SampleType centreFrequency, SampleType bandwidth )

nodiscardnoexcept

A constant 0db peak-gain RBJ bandpass implementation for use with the Biquad class, based on the formulae from the RBJ Cookbook (https://webaudio.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html)

Parameters

sampleRate	The sample rate to base the calculations off.
centreFrequency	The centre frequency of the bandpass.
bandwidth	The bandwidth of the bandpass in octaves.

Returns

An instance of BiquadCoefficients populated with the resulting coefficients.

bandpass() [2/2]

template<FloatType SampleType>

BiquadCoefficients< SampleType > marvin::dsp::filters::rbj::bandpass ( double sampleRate, SampleType centreFrequency, SampleType bandwidth, SampleType peakGain )

nodiscardnoexcept

A constant skirt-gain RBJ bandpass implementation for use with the Biquad class, based on the formulae from the RBJ Cookbook (https://webaudio.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html)

Parameters

sampleRate	The sample rate to base the calculations off.
centreFrequency	The centre frequency of the bandpass.
peakGain	The peak gain of the bandpass (between 0 and 1)

Returns

An instance of BiquadCoefficients populated with the resulting coefficients.

highpass()

template<FloatType SampleType>

BiquadCoefficients< SampleType > marvin::dsp::filters::rbj::highpass ( double sampleRate, SampleType cutoff, SampleType q )

nodiscardnoexcept

An RBJ highpass implementation for use with the Biquad class, based on the formulae from the RBJ Cookbook (https://webaudio.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html)

Parameters

sampleRate	The sample rate to base the calculations off.
cutoff	The frequency of the highpass
q	The resonance of the highpass (between 0 and 1)

Returns

An instance of BiquadCoefficients populated with the resulting coefficients.

highShelf()

template<FloatType SampleType>

BiquadCoefficients< SampleType > marvin::dsp::filters::rbj::highShelf ( double sampleRate, SampleType centreFrequency, SampleType slope, SampleType dbGain )

nodiscardnoexcept

An RBJ high shelf implementation for use with the Biquad class, based on the formulae from the RBJ Cookbook (https://webaudio.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html)

Parameters

sampleRate	The sample rate to base the calculations off.
centreFrequency	The centre frequency of the shelf.
slope	The slope of the shelf in db/octave. At slope=1, the shelf is as steep as it can be. Should be between std::numeric_limits<SampleType>::min(), and 1`.
dbGain	The gain of the shelf, in decibels.

Returns

An instance of BiquadCoefficients populated with the resulting coefficients.

lowpass()

template<FloatType SampleType>

BiquadCoefficients< SampleType > marvin::dsp::filters::rbj::lowpass ( double sampleRate, SampleType cutoff, SampleType q )

nodiscardnoexcept

An RBJ lowpass implementation for use with the Biquad class, with formulae from the RBJ Cookbook

Parameters

sampleRate	The sample rate to base the calculations off.
cutoff	The frequency of the lowpass
q	The resonance of the lowpass(between 0 and 1)

Returns

An instance of BiquadCoefficients populated with the resulting coefficients.* /

lowShelf()

template<FloatType SampleType>

BiquadCoefficients< SampleType > marvin::dsp::filters::rbj::lowShelf ( double sampleRate, SampleType centreFrequency, SampleType slope, SampleType dbGain )

nodiscardnoexcept

An RBJ low shelf implementation for use with the Biquad class, based on the formulae from the RBJ Cookbook (https://webaudio.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html)

Parameters

sampleRate	The sample rate to base the calculations off.
centreFrequency	The centre frequency of the shelf.
slope	The slope of the shelf in db/octave. At slope=1, the shelf is as steep as it can be. Should be between std::numeric_limits<SampleType>::min(), and 1`.
dbGain	The gain of the shelf, in decibels.

Returns

An instance of BiquadCoefficients populated with the resulting coefficients.

notch()

template<FloatType SampleType>

BiquadCoefficients< SampleType > marvin::dsp::filters::rbj::notch ( double sampleRate, SampleType centreFrequency, SampleType bandwidth )

nodiscardnoexcept

An RBJ notch implementation for use with the Biquad class, based on the formulae from the RBJ Cookbook (https://webaudio.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html)

Parameters

sampleRate	The sample rate to base the calculations off.
centreFrequency	The centre frequency of the notch.
bandwidth	The bandwidth of the notch in octaves.

Returns

An instance of BiquadCoefficients populated with the resulting coefficients.

peak()

template<FloatType SampleType>

BiquadCoefficients< SampleType > marvin::dsp::filters::rbj::peak ( double sampleRate, SampleType centreFrequency, SampleType bandwidth, SampleType dbGain )

nodiscardnoexcept

An RBJ bell implementation for use with the Biquad class, based on the formulae from the RBJ Cookbook (https://webaudio.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html)

Parameters

sampleRate	The sample rate to base the calculations off.
centreFrequency	The centre frequency of the bell.
bandwidth	The bandwidth of the bell in octaves.
dbGain	The gain of the bell, in decibels.

Returns

An instance of BiquadCoefficients populated with the resulting coefficients.