[PD] Csound opcode Moogladder to Pd?

Frank Barknecht fbar at footils.org
Tue Aug 26 12:26:07 CEST 2008

Anton H?rnquist hat gesagt: // Anton H?rnquist wrote:

> Frank - that was fast! Thanks!
> I haven't had time to try it out yet but will report back when I get
> home. The csound opcode I've used myself is a modification of the
> original with signal input for cutoff (please find it attached).
> Signal input for both cutoff and resonance would of course be awesome.

I now made a version where cutoff and resonance are signals.  This
version is a bit more CPU intensive now, as some computations had to
move into the DSP loop to react to the changes in center frequency.

I played a bit with a rational tanh approximation from the music-dsp
list but it didn't sound good anymore. If someone wants to play with
other approximations e.g. table lookup: Just change the function

The filter response gets nasty and loud if the center frequency is near
or above the sampling rate. Maybe it should be restricted as well. But
then, resonance at 1 will make everyone jump, too...

The updated code is at http://footils.org/pkg/moogladder-0.2.tgz


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