See also:

• Science: Math: Analysis: Transform Calculus  (6)
• Science: Technology: Electronics: Signal Processing  (122)

• 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.