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  FFTW  [hits=1 votes=1 rating=5.0] : FFTW Home Page - FFTW is a C subroutine library for computing the Discrete Fourier Transform (DFT) in one or more dimensions, of both real and complex data, and of arbitrary input size. We believe that FFTW, which is free software, should become the FFT library of choice for most applications. Our benchmarks, performed on on a variety of platforms, show that FFTW's performance is typically superior to that of other publicly available FFT software. Moreover, FFTW's performance is portable: the program will perform well on most architectures without modification.
  FFT Source Code  [hits=1 votes=1 rating=5.0] : FFTW Home Page - FFTW is a C subroutine library for computing the Discrete Fourier Transform (DFT) in one or more dimensions, of both real and complex data, and of arbitrary input size. We believe that FFTW, which is free software, should become the FFT library of choice for most applications. Our benchmarks, performed on on a variety of platforms, show that FFTW's performance is typically superior to that of other publicly available FFT software. Moreover, FFTW's performance is portable: the program will perform well on most architectures without modification.
  Matlab  [hits=1 votes=1 rating=5.0] : Getting Started - Matlab is a high-level scripting language for scientific computing - Matlab is a high-level language for scientific numerical computation - See also / Computing / Software Tools / Octave.
  Octave (2 competing definitions)
  Patterson-Holdsworth filter bank (2 competing definitions)
  WaveLab  [hits=1 votes=1 rating=5.0] : WaveLab802 - Free Wavelet software in Matlab