[PD] anyone have a nice filter?

Ben Saylor bensaylor at hotpop.com
Tue Aug 12 22:24:39 CEST 2003

Sounds good.  I know my svf~ is relatively CPU-hungry, but I haven't 
gotten around to optimizing it - just kinda abandoned it instead :)


On Monday 11 August 2003 2:50 am, Krzysztof Czaja wrote:
> hi Ben,
> ok, this is just my pestering again (someone is going to show me
> a noose soon).  There is an svf~ to be released in the cyclone's
> next snapshot.  Differences are
> . the clone has 4 outlets, instead of a configurable single outlet
> . the clone has no additional resonance inlet (just the q one)
> . the clone does no oversampling, uses simpler formulae for coefs
>    (calculated once per block), etc., which all makes a difference
>    of max 340 clones against max 42 of yours svf~s on my machine
>    (think about using it in polyphonic instruments).
> . neither is fine-tuned, but the clone does have some protection
>    against over-blowing.
> In the max/msp land there is both the fast, 4-out svf~, and
> oversampled, 1-out (and fine-tuned) 2up_svf~.  Btw. the latter
> is open-source (in a way).
> Krzysztof
> Ben Saylor wrote:
> > Thanks, I'm glad it's useful.. I think the filter was originally
> > written by Andrew Simper who posted it to music-dsp (musicdsp.org).
> ...
> >>>>The svf~ external is quite nice (IIRC, it's a PD port of a LADSPA
> >>>>plugin by Steve Harris). You can get it as part of the PD

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