— Command: **filter-length**` n`

This command sets the filter length to

n. The filter length is the number of filter coefficients.

— Command: **sampling-frequency**` f`

This command sets the sampling frequency to

f. All other frequencies in a specification file must belong to the band [0..f/2].

— Command: **sine-symmetry**

— Command:**cosine-symmetry**

— Command:

The command

`(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`(cosine-symmetry)`

.