I read:

flexable, software. i'm just wondering if anybody has built any synth patches in pd

basically most things you can think of can be done in pd, if you have some insight in csound a lot of stuff can easily be converted to pd, I suggest you start by looking again in doc/ and modify what you like there.

I found vasp and vex very useful tools to fill tables for various synthesis methods (much like the csound GENs) the only thing not really trivial (and cpu intensive) up to now is building polyphonic intruments (though I didn't look at dyn~ yet)

regards,

x