Hallo, Jo?o Pais hat gesagt: // Jo?o Pais wrote:
yes, I had seen that graphic as well. but trying out the highpass
iemfilters with noise, turns out that 10 hip~s work better.
Hehe, I guess that's because you filter noise: It's harder to recognize the noise that the 10 hip stages added. :)
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.
A biquad~ has only two poles and zeroes, so you would need to cascade several stages to get a really sharp filter.
Frank