fftw

v 2.1.5

Fast C routines to compute the Discrete Fourier Transform

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 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.

http://www.fftw.org/

To install fftw, paste this in macOS terminal after installing MacPorts

sudo port install fftw

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