NAudio.Dsp.SmbPitchShifter Class Reference

SMB Pitch Shifter. More...

Collaboration diagram for NAudio.Dsp.SmbPitchShifter:

Public Member Functions
void	PitchShift (float pitchShift, long numSampsToProcess, float sampleRate, float[] indata)
	Performs pitch shifting on the input audio data.
void	PitchShift (float pitchShift, long numSampsToProcess, long fftFrameSize, long osamp, float sampleRate, float[] indata)
	Pitch Shift.
void	ShortTimeFourierTransform (float[] fftBuffer, long fftFrameSize, long sign)
	Performs the Short Time Fourier Transform on the input FFT buffer.

Private Attributes
float[]	gInFIFO = new float[MAX_FRAME_LENGTH]
float[]	gOutFIFO = new float[MAX_FRAME_LENGTH]
float[]	gFFTworksp = new float[2*MAX_FRAME_LENGTH]
float[]	gLastPhase = new float[MAX_FRAME_LENGTH/2 + 1]
float[]	gSumPhase = new float[MAX_FRAME_LENGTH/2 + 1]
float[]	gOutputAccum = new float[2*MAX_FRAME_LENGTH]
float[]	gAnaFreq = new float[MAX_FRAME_LENGTH]
float[]	gAnaMagn = new float[MAX_FRAME_LENGTH]
float[]	gSynFreq = new float[MAX_FRAME_LENGTH]
float[]	gSynMagn = new float[MAX_FRAME_LENGTH]
long	gRover

Static Private Attributes
static int	MAX_FRAME_LENGTH = 16000

Detailed Description

SMB Pitch Shifter.

Member Function Documentation

PitchShift() [1/2]

void NAudio.Dsp.SmbPitchShifter.PitchShift ( float pitchShift, long numSampsToProcess, float sampleRate, float[] indata )

inline

Performs pitch shifting on the input audio data.

Parameters

pitchShift	The amount of pitch shift to be applied.
numSampsToProcess	The number of samples to process.
fftFrameSize	The size of the FFT frame.
osamp	The oversampling factor.
sampleRate	The sample rate of the input audio data.
indata	The input audio data to be processed.

This method performs pitch shifting on the input audio data using the Phase Vocoder algorithm. It processes the input audio data in frames of size fftFrameSize using the Short-Time Fourier Transform (STFT) technique. The pitch shift amount is specified by pitchShift and the oversampling factor is specified by osamp . The processed output is stored in the indata array.

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PitchShift() [2/2]

void NAudio.Dsp.SmbPitchShifter.PitchShift ( float pitchShift, long numSampsToProcess, long fftFrameSize, long osamp, float sampleRate, float[] indata )

inline

Pitch Shift.

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ShortTimeFourierTransform()

void NAudio.Dsp.SmbPitchShifter.ShortTimeFourierTransform ( float[] fftBuffer, long fftFrameSize, long sign )

inline

Performs the Short Time Fourier Transform on the input FFT buffer.

Parameters

fftBuffer	The input buffer containing the data to be transformed.
fftFrameSize	The size of the FFT frame.
sign	The sign of the transform, usually 1 for forward transform and -1 for inverse transform.

This method performs the Short Time Fourier Transform (STFT) on the input FFT buffer. It rearranges the elements of the buffer and applies the STFT algorithm to transform the data. The method modifies the original FFT buffer in place.

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Member Data Documentation

gAnaFreq

float [] NAudio.Dsp.SmbPitchShifter.gAnaFreq = new float[MAX_FRAME_LENGTH]

private

gAnaMagn

float [] NAudio.Dsp.SmbPitchShifter.gAnaMagn = new float[MAX_FRAME_LENGTH]

private

gFFTworksp

float [] NAudio.Dsp.SmbPitchShifter.gFFTworksp = new float[2*MAX_FRAME_LENGTH]

private

gInFIFO

float [] NAudio.Dsp.SmbPitchShifter.gInFIFO = new float[MAX_FRAME_LENGTH]

private

gLastPhase

float [] NAudio.Dsp.SmbPitchShifter.gLastPhase = new float[MAX_FRAME_LENGTH/2 + 1]

private

gOutFIFO

float [] NAudio.Dsp.SmbPitchShifter.gOutFIFO = new float[MAX_FRAME_LENGTH]

private

gOutputAccum

float [] NAudio.Dsp.SmbPitchShifter.gOutputAccum = new float[2*MAX_FRAME_LENGTH]

private

gRover

long NAudio.Dsp.SmbPitchShifter.gRover

private

gSumPhase

float [] NAudio.Dsp.SmbPitchShifter.gSumPhase = new float[MAX_FRAME_LENGTH/2 + 1]

private

gSynFreq

float [] NAudio.Dsp.SmbPitchShifter.gSynFreq = new float[MAX_FRAME_LENGTH]

private

gSynMagn

float [] NAudio.Dsp.SmbPitchShifter.gSynMagn = new float[MAX_FRAME_LENGTH]

private

MAX_FRAME_LENGTH

int NAudio.Dsp.SmbPitchShifter.MAX_FRAME_LENGTH = 16000

staticprivate

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

• /Users/sumansaurabh/Documents/my-startup/xeno-rat/Plugins/LiveMicrophone/lib/NAudio.Core/Dsp/SmbPitchShifter.cs