> Great that you're doing this!

thanks, here's a pic of what I have so far

https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-prn1/11212_10151872996046683_1825736206_n.jpg

> For extra inspiration you could have a look at PoZeTools

It sure does look like what I need. Thanks. But extracting what I need to know about the math of converting from coordinates to coefficients was just over my head :P unfortunately, sorry.

I was hoping for something simpler, like just the operations needed. If the info is in code, I need it to more explicit. I'd really appreciate if anyone knows how to read from this and just points it out for me so I can put it in a patch.

I'm assuming it's rather simple math

Cheers

Alex

2013/9/23 Funs Seelen <funsseelen@gmail.com>

Hi Alexandre,

Great that you're doing this! For extra inspiration you could have a look at PoZeTools (http://kmt.hku.nl/~pieter/SOFT/RESP/html/PoZeTools.html). It's great software by Pieter Suurmond. He's the one who taught me filter design and he probably has some info about Z-transform on his website as well.

Regards,
--Funs

On Mon, Sep 23, 2013 at 7:37 AM, Alexandre Torres Porres <porres@gmail.com> wrote:

Hi there. So, I've been studying a lot about filters, and I'm doing this clone of max's z-plane in Pd.

I hope anyone can help me guide where to find how to convert the values of the complex poles and zeros to biquad coefficients. I really needed that...

Sorry if I missed it in Miller's book or some other obvious reference, I'm just really a newbie in filter design.

Thanks
Alex

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