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  3. FOnsetStrengthAnalyzer

FOnsetStrengthAnalyzer

[FOnsetStrengthAnalyzer](API\Plugins\AudioSynesthesiaCore\FOnsetStrengthAnalyzer)

Unreal Engine C++ API Reference > Plugins > AudioSynesthesiaCore

References

   
Module AudioSynesthesiaCore
Header /Engine/Plugins/Runtime/AudioSynesthesia/Source/AudioSynesthesiaCore/Public/OnsetAnalyzer.h
Include #include "OnsetAnalyzer.h"

Syntax

class FOnsetStrengthAnalyzer

Remarks

FOnsetStrengthAnalyzer

FOnsetStrengthAnalyzer calculates the onset strength from audio.

Onset strength is calculated as the half wave rectificed difference between two spectral frames. This onset strength onset analyzer uses the following approach.

[audio]->[fft]->[mel spectrum]->[diff]->[half wave rectify]->[mean]->[onset strength] | | >-[lag]--|

Constructors

  Type Name Description
Public function  

FOnsetStrengthAnalyzer ( const FOnsetStrengthSettings& InSettings,
float InSampleRate
)

  

Functions

  Type Name Description
Public function void

CalculateOnsetStrengths ( TArrayView< const float > InSamples,
TArray< float >& OutOnsetStrengths
)

 Calculates onset strengths from audio and fills OutOnsetStrengths with generated onset strengths
Public function void

FlushAudio ( TArray< float >& OutEnvelopeStrengths
)

 Call when done processing audio for an audio analyzer
Public function Static float

GetTimestampForIndex ( const FOnsetStrengthSettings& InSettings,
float InSampleRate,
int32 InIndex
)

 Converts an onset strength index into a timestamp.
Public function void

Reset ()

 Call to reset internal counters and lag spectra.

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