FFT Page - Links and various Fortran FFT implementations..
fftpack - A package of Fortran subprograms for the fast Fourier transform of periodic and other symmetric sequences..
FFTW - Fast free C FFT library; includes multi-dimensional, real-complex, and parallel transforms..
Jens J. Nielsen's Home Page - Arbitrary length FFT C-source, 3D gravity simulator, quantization of FIR filter coefficients. C source..
Joerg's FXT Page - Source code and links for many different FFT implementations and related information..
Row-oriented Multidimensional Fast Transform Library (RMFTL) - Power-of-two real and complex FFT software that is faster, and more accurate, than conventional iterative implementation of one-dimensional FFTs. Based on a proprietary algorithm..
Sigview - FFT Analysis Software - A real-time spectral analysis application with spectral analysis tools, statistical functions and visualization system. It can analyse data from WAV files or sound input from microphone or CD player. Shareware..
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