You might also find this file helpful, a kind of filter bible:<div><a href="http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt">http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt</a><br><br><div class="gmail_quote">On Mon, Sep 27, 2010 at 5:29 AM, cyrille henry <span dir="ltr"><<a href="mailto:ch@chnry.net">ch@chnry.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">hello,<br>
you have some exter to compute biquad~ coef in ggee/filter repertory.<br>
<br>
i also made some abstraction to compute bq~ coef.<br>
you can find them in nusmuk directory in svn.<br>
<br>
Cyrille<br>
<br>
<br>
Le 27/09/2010 10:34, Maurizio Giri a écrit :<div><div></div><div class="h5"><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi, I'm trying to convert some PD patches to MaxMSP.<br>
However I have a problem with the vcf~ object, it seems it doesnt have an EXACT equivalent in maxmsp: reson~, svf~, and the filtergraph~ bandpass all sound different from vcf~<br>
I'd like to use biquad~ to emulate a vcf~ filter, but I don't have the vcf~ formula to calculate the coefficients.<br>
Does somebody know how I can calculate them?<br>
As I said filtergraph~, reson~ and the other maxmsp objects are not identical to vcf~ so they are not good for my pourpose.<br>
<br>
TIA!<br>
mau<br>
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