Hallo, Claude Heiland-Allen hat gesagt: // Claude Heiland-Allen wrote:
Frank Barknecht wrote:
I think, it may also be possible to implement it as a pure Pd abstraction with some stacked [rpole~]s and fine tuning, as from a quick look it seems to be just a bunch of first order filters with tanh()-distorted filter coefficients. But quick looks may be deceiving ...
You have been deceived, the filter has the tanh()s inside the recursive loops, so it's not a linear filter.
I'm deceived too easily. ;)
To make up for my mistake, I did a quick port of Victor's CSound code to a Pd external here: http://footils.org/pkg/moogladder-0.1.tgz
It's just a quick copy-and-paste version, not really tested, so expect bugs and be careful with the volume! The makefile only has a pd_linux target, but it may be a start if someone wants to take over. Possible enhancements could include signal inlets for frequency and resonance instead of float inlets and maybe table lookup for the tanh-calculation instead of direct computation.
Ciao
Frank Barknecht