dsp::LadderFilter< Type > Class Template Reference

Multi-mode filter based on the Moog ladder filter. More...

Public Types
enum	Mode { Mode::LPF12, Mode::HPF12, Mode::LPF24, Mode::HPF24 }

Public Member Functions
	LadderFilter ()
	Creates an uninitialised filter. More...
void	setEnabled (bool newValue) noexcept
	Enables or disables the filter. More...
void	setMode (Mode newValue) noexcept
	Sets filter mode. More...
void	prepare (const juce::dsp::ProcessSpec &spec)
	Initialises the filter. More...
size_t	getNumChannels () const noexcept
	Returns the current number of channels. More...
void	reset () noexcept
	Resets the internal state variables of the filter. More...
void	setCutoffFrequencyHz (Type newValue) noexcept
	Sets the cutoff frequency of the filter. More...
void	setResonance (Type newValue) noexcept
	Sets the resonance of the filter. More...
void	setDrive (Type newValue) noexcept
	Sets the amount of saturation in the filter. More...
template<typename ProcessContext >
void	process (const ProcessContext &context) noexcept

Protected Member Functions
Type	processSample (Type inputValue, size_t channelToUse) noexcept
void	updateSmoothers () noexcept

Detailed Description

template<typename Type>
class dsp::LadderFilter< Type >

Multi-mode filter based on the Moog ladder filter.

Member Enumeration Documentation

Mode

template<typename Type >

enum dsp::LadderFilter::Mode

strong

Enumerator
LPF12
HPF12
LPF24
HPF24

Constructor & Destructor Documentation

LadderFilter()

template<typename Type >

dsp::LadderFilter< Type >::LadderFilter

(

)

Creates an uninitialised filter.

Call prepare() before first use.

Member Function Documentation

setEnabled()

template<typename Type >

void dsp::LadderFilter< Type >::setEnabled ( bool  newValue )

noexcept

Enables or disables the filter.

If disabled it will simply pass through the input signal.

References dsp::LadderFilter< Type >::prepare(), and dsp::LadderFilter< Type >::setMode().

setMode()

template<typename Type >

void dsp::LadderFilter< Type >::setMode ( Mode  newValue )

noexcept

Sets filter mode.

Referenced by dsp::LadderFilter< Type >::setEnabled().

prepare()

template<typename Type >

void dsp::LadderFilter< Type >::prepare

(

const juce::dsp::ProcessSpec &

spec

)

Initialises the filter.

Referenced by dsp::LadderFilter< Type >::setEnabled().

getNumChannels()

template<typename Type >

size_t dsp::LadderFilter< Type >::getNumChannels ( ) const

noexcept

Returns the current number of channels.

References dsp::LadderFilter< Type >::reset(), dsp::LadderFilter< Type >::setCutoffFrequencyHz(), dsp::LadderFilter< Type >::setDrive(), and dsp::LadderFilter< Type >::setResonance().

Referenced by dsp::LadderFilter< Type >::process().

reset()

template<typename Type >

void dsp::LadderFilter< Type >::reset ( )

noexcept

Resets the internal state variables of the filter.

Referenced by dsp::LadderFilter< Type >::getNumChannels().

setCutoffFrequencyHz()

template<typename Type >

void dsp::LadderFilter< Type >::setCutoffFrequencyHz ( Type  newValue )

noexcept

Sets the cutoff frequency of the filter.

Parameters

newValue

cutoff frequency in Hz

Referenced by dsp::LadderFilter< Type >::getNumChannels().

setResonance()

template<typename Type >

void dsp::LadderFilter< Type >::setResonance ( Type  newValue )

noexcept

Sets the resonance of the filter.

Parameters

newValue

a value between 0 and 1; higher values increase the resonance and can result in self oscillation!

Referenced by dsp::LadderFilter< Type >::getNumChannels().

setDrive()

template<typename Type >

void dsp::LadderFilter< Type >::setDrive ( Type  newValue )

noexcept

Sets the amount of saturation in the filter.

Parameters

newValue

saturation amount; it can be any number greater than or equal to one. Higher values result in more distortion.

Referenced by dsp::LadderFilter< Type >::getNumChannels().

process()

template<typename Type >

template<typename ProcessContext >

void dsp::LadderFilter< Type >::process ( const ProcessContext &  context )

noexcept

References dsp::LadderFilter< Type >::getNumChannels(), jassert, jmap(), dsp::LadderFilter< Type >::processSample(), SmoothedValue< FloatType, SmoothingType >::setTargetValue(), and dsp::LadderFilter< Type >::updateSmoothers().

processSample()

template<typename Type >

Type dsp::LadderFilter< Type >::processSample ( Type  inputValue, size_t  channelToUse  )

protectednoexcept

Referenced by dsp::LadderFilter< Type >::process().

updateSmoothers()

template<typename Type >

void dsp::LadderFilter< Type >::updateSmoothers ( )

protectednoexcept

Referenced by dsp::LadderFilter< Type >::process().

---

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

• juce_LadderFilter.h