I read:
How difficult would it be to port this to pd?
I guess provided he shares the sources not at all
I think the csound~ object is supposed to be open-sourced in some form or another.
not on the website, just patches an external and a precompiled csoundlib
I'll nevertheless try to contact him about it (actually I did that a few days ago when he first mentioned it on the cs list)
regards,
x