Hi all,
The FIWIZ filter designer (www.icsi.berkeley.edu/~storn/fiwiz.html)
is now available in version 1.2. The added feature this time is
Definition of a prefilter with constant coefficients:
Defining a prefilter has many applications like presetting specific
zeroes to
suppress DC or the 50/60Hz powerline frequency, accomodating filters
which are already in a design and cannot be removed, or setting a
frequency
response to equalize. A well-known example for the latter is sinc
compensation
needed for D/A-conversion.
Regards
Rainer