PHP Classes

Fast Fourier Transform: Compute the Fast Fourier Transform of sampled data

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fft 0.1GNU General Publi...5Algorithms, PHP 5, Audio
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This class can be used to compute the Fast Fourier Transform (FFT) of sampled data, as well the inverse Fast Fourier transform.

It takes an array of sample data values and calculates the respective Fast Fourier Transform. The result is returned as an array of complex values.

The class can also do the opposite, i.e. compute the inverse Fast Fourier transform .

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Fast Fourier transform is an algorithm that can be used to compute the spectrum of frequencies of a sound sample or any other type of sampled signal.

This class can be used to compute the Fast Fourier transform of a given sample, as well the inverse operation, rebuild the original signal from its frequency spectrum.

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Plain text file Complex.class.php Class Complex class
Plain text file FFT.class.php Class FFT class
Accessible without login Plain text file index.php Example Index
Accessible without login HTML file output.html Output Output

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User Comments (1)
Array dimensions limited to power of 2.
9 years ago (Özkan KIRIK)
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