Check out http://www.pure-data.org and http://iem.kug.ac.at/pd . You should find everything you need, or at least links to everything.
Specifically, with regard to real-time sound effects, there are patches in the examples that do this. There are also patches where you can record some audio into Pd and then play it back with the effect. Keep hunting around in there. The whole help system is excellent.
(jfm3)
On Mon, 16 Apr 2001 bensobrs@greenie.frogspace.net wrote:
Hello. I'm a new pd user, and am wondering if there is any detailed manual out there, written in as plain english as possible, on pd, how to develop for it, etc.
Also, does anyone know of a simple, ready to go, live sound-effect processor file - flange, sweep, etc. The examples that come with pd seem to work only on pre-recorded samples, and I don't know yet how to build my own file.