# Hi, here is an abstraction that I made when I was learning about filters and resonances. I used [fexpr~] but now I know using a [biquad] will be more efficient and simple.<br># But in this implementation you can't set the resonance at audio rate, it accepts control messages.
<br>-ugur guney-<br><br><div><span class="gmail_quote">On 2/14/07, <b class="gmail_sendername">Vreahli the Audio Bandit</b> <<a href="mailto:vreahli@gmail.com">vreahli@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hiya. Okay - so here's the skinny. I set out about a half hour ago to<br>figure out how to set up a 2 pole low pass filter with resonance in<br>Puredata. Looks like that's apparently set up with a biquad~ filter. I
<br>read through the rather handy looking information over here at<br><a href="http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt">http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt</a>. I came out of that<br>a bit more confused than when I went in. I also bumped in to
<br><a href="http://www.creativesynth.com/MAXMSP/001-SynthBuildingMSP/sbm_03.html">http://www.creativesynth.com/MAXMSP/001-SynthBuildingMSP/sbm_03.html</a> -<br>which left me drooling quite a bit more than when I went in. Is there
<br>any way to set up a LPF with a live-tweakable audio rate resonance and<br>frequency setting while avoiding doing the biquad math by hand? I can't<br>even figure out how to get my computer to crunch those numbers for me.
<br>Thanks in advance for helping me out with this seemingly simple yet<br>convoluted question.<br><br>_______________________________________________<br><a href="mailto:PD-list@iem.at">PD-list@iem.at</a> mailing list<br>
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