thanks for your help guys.

maybe i misunderstood the concept of minimum phase. i believed a minimum phase filter provides the least amount of phase distortion. i've seen butterworth vs chebyshev phase distortion and its pretty clear (and audible as well) that chebyshev filter causes a lot less phase distortion (better sound resolution, less smearing). i'm looking for even better filters (specifically for the least smearing LP filters) so i was looking into minimum phase. i was comparing with fabfilter's Pro-Q and couldn't understand what they were using (they have options for linear phase and minimum phase so that was my intuition).

anyway thanks very much for your help. hopefully i would figure this out soon

By the way, it is not mentioned in the CS docs anywhere, but it seems that butterworth filters (butterbp, butterbr, butterhp, butterlp) are minimum phase. http://www.xsgeo.com/course/filt.htm

On Mon, Oct 21, 2013 at 11:49 AM, Steven Yi <stevenyi@gmail.com> wrote:

Maybe these pages would help:

http://csounds.com/manual/html/SigmodStandard.html
http://csounds.com/manual/html/SigmodSpeciali.html

On Sun, Oct 20, 2013 at 6:36 PM, Machina <machinadeoro@gmail.com> wrote:
>
> hi
>
> i see only butterworth, chebyshev, and elliptic filter.
> where can i find more filters implemented in csound?
> im specifically looking for minimum phase filter (and other IIR)
>
> thanks
>

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