This command sets the filter length to n. The filter length is the number of filter coefficients.
This command sets the sampling frequency to f. All other frequencies in a specification file must belong to the band [0..f/2].
(sine-symmetry)specifies that the frequency response H(f) is an odd function, i.e., H(-f) = - H(f). The command
(cosine-symmetry)specifies that the frequency response H(f) is an even function, i.e., H(f) = H(f). The default is