Change Details

Improve Fourier filter (T1989). Ideas: * use fftw3 instead of gsl if available * support ripple factor for Chebyshev filter * more filter forms (Bessel, Gaussian, Parabola, etc.) * Threshold filter type * spectrum and filter preview

Improve Fourier filter (T1989). Ideas: * use fftw3 instead of gsl if available * support ripple factor for Chebyshev filter * more filter forms (Bessel, Gaussian, Elliptic, Legendre ("L"), Parabola, Raised-Cosine, etc.) * Threshold filter type * spectrum and filter preview

Improve Fourier filter (T1989). Ideas: * use fftw3 instead of gsl if available * support ripple factor for Chebyshev filter * more filter forms (Bessel, Gaussian, Elliptic, Legendre ("L"), Parabola, Raised-Cosine, etc.) * Threshold filter type * spectrum and filter preview