[PD] steep filter?

[João Pais]

>>> 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.

ah ah, that's true. actually I didn't need anything so far that *had* to  
be done with fft, so I never learned it properly (just unproperly a couple  
of times, like yours, in which I didn't exercise afterwards).

of course I would be interested in the filter, as well as the rest of the  
community should be. don't make any rush because of me, because it can  
happen that after a while I don't need it anymore (in case you're too busy  
with something else). but if you want to join your code to pd-ext,  
everyone will be happy. (and windows compatible, please)