On 16 Mar 2009, at 09:25, Frank Barknecht wrote:
Jo?o Pais hat gesagt: // Jo?o Pais wrote:
I looked in my list of pd-ext objects, but found no elliptic
filters. are there any, or any way of getting their coefficients to use with
biquad~?Elliptic filters are rather hard to design, most of the time you
will find Butterworth or Chebyshev designs in our little audio world.
hey, joão
you still haven't made friends with fft? ;)
i've just finished a max external that does chebyshev filtering with
a variable number of poles and adjustable % of ripple in the
passband. repackaging this into a pd external wouldn't be too hard.
if you are interested in trying this out, drop me a mail and i'll see
when i can get it done.
volker.