NAudio.Dsp.FastFourierTransform Class Reference

Summary description for FastFourierTransform. More...

Collaboration diagram for NAudio.Dsp.FastFourierTransform:

Static Public Member Functions
static void	FFT (bool forward, int m, Complex[] data)
	Computes the Fast Fourier Transform (FFT) of the input data array.
static double	HammingWindow (int n, int frameSize)
	Calculates the value of the Hamming window function at the specified index for a given frame size.
static double	HannWindow (int n, int frameSize)
	Calculates the Hann window value for the given index and frame size.
static double	BlackmannHarrisWindow (int n, int frameSize)
	Calculates the value of the Blackman-Harris window function at a given index.

Detailed Description

Summary description for FastFourierTransform.

Member Function Documentation

BlackmannHarrisWindow()

static double NAudio.Dsp.FastFourierTransform.BlackmannHarrisWindow ( int n, int frameSize )

inlinestatic

Calculates the value of the Blackman-Harris window function at a given index.

Parameters

n	The index at which to calculate the window function value.
frameSize	The size of the frame for which the window function is being calculated.

Returns

The value of the Blackman-Harris window function at the specified index n .

FFT()

static void NAudio.Dsp.FastFourierTransform.FFT ( bool forward, int m, Complex[] data )

inlinestatic

Computes the Fast Fourier Transform (FFT) of the input data array.

Parameters

forward	Specifies whether to compute the forward or inverse FFT.
m	The number of bits representing the size of the input data array.
data	The input data array of complex numbers.

This method computes the FFT of the input data array using the Cooley-Tukey algorithm, which is a divide-and-conquer algorithm for efficiently computing the FFT. The method performs bit reversal on the input data array, then computes the FFT using iterative butterfly operations. The scaling for the forward transform is applied if the forward parameter is set to true.

HammingWindow()

static double NAudio.Dsp.FastFourierTransform.HammingWindow ( int n, int frameSize )

inlinestatic

Calculates the value of the Hamming window function at the specified index for a given frame size.

Parameters

n	The index at which to calculate the Hamming window function.
frameSize	The size of the frame for which the Hamming window function is being calculated.

Returns

The value of the Hamming window function at the specified index for the given frame size.

The Hamming window function is defined as 0.54 - 0.46 * Math.Cos((2 * Math.PI * n) / (frameSize - 1)). It is commonly used in signal processing to reduce spectral leakage when performing a Fourier Transform on a windowed signal.

HannWindow()

static double NAudio.Dsp.FastFourierTransform.HannWindow ( int n, int frameSize )

inlinestatic

Calculates the Hann window value for the given index and frame size.

Parameters

n	The index for which the Hann window value is to be calculated.
frameSize	The size of the frame for which the Hann window value is to be calculated.

Returns

The Hann window value for the given index and frame size.

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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/FastFourierTransform.cs