FFlexiverb | Unreal Engine 5.7 Documentation

API > API/Plugins > API/Plugins/Synthesis

FFlexiverb Flexiverb is a computationally inexpensive single-channel reverb algorithm optimized for maximizing echo density with as few multiplies as possible. This effect is best suited for emulating small room reverberation on platforms where CPU resources are limited. At longer decay times, this reverb algorithm begins to sound very metallic. This algorithm uses a Householder matrix as the scattering matrix for an FDN. More information on this can be found here: https://ccrma.stanford.edu/~jos/pasp/Householder_Feedback_Matrix.html


Name	FFlexiverb
Type	class
Header File	/Engine/Plugins/Runtime/Synthesis/Source/Synthesis/Public/Flexiverb.h
Include Path	#include "Flexiverb.h"

Syntax

class FFlexiverb

Constructors

Name	Remarks	Include Path	Unreal Specifiers
FFlexiverb()		Flexiverb.h

Destructors

Name	Remarks	Include Path	Unreal Specifiers
~FFlexiverb()		Flexiverb.h

Variables

Protected

Name	Type	Remarks	Include Path
APFArray	TArray< FDelayAPF >	Series of APF filters used to decorrelate the input before it enters the FDN.	Flexiverb.h
DampeningArray	TArray< FOnePoleLPF >	Room dampening is handled with second order parametric filters.	Flexiverb.h
DecayFactor	float	Factor applied to the input of all delays lines.	Flexiverb.h
DelayLines	TArray< FDelayAPF >	Delay lines used for the primary FDN.	Flexiverb.h
PreDelayLine	FDelay	Delay Line used for pre-delay.	Flexiverb.h
PrivateSettings	FFlexiverbSettings	Private copy of the current reverb settings.	Flexiverb.h
SampleRate	float	Sample rate this instance is initialized to.	Flexiverb.h
ScatteringMatrixLength	int32	Amount of delay lines in our FDN.	Flexiverb.h

Functions

Public

Name	Remarks	Include Path
void Init ( const int32 InSampleRate, const FFlexiverbSettings Settings )	Initialize the reverb with the given sample rate and initial settings.	Flexiverb.h
void ProcessAudioFrame ( const float* InBuffer, const int32 InChannels, float* OutBuffer, const int32 OutChannels )	Process a single audio frame.	Flexiverb.h
void SetSettings ( const FFlexiverbSettings& InSettings )	Updates the current settings of this reverb.	Flexiverb.h

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