FFTW

FFTW (Fastest Fourier Transform in the West) is a highly efficient software library used to compute Fourier transforms, which analyze how signals change over time by breaking them down into their basic frequencies. This process is essential in fields like audio processing, image analysis, and scientific data analysis. FFTW is designed to perform these calculations quickly and accurately, optimizing performance based on the specific hardware it's running on. It is widely used by researchers and engineers to process large data sets efficiently, enabling better insights and applications across various technological and scientific domains.