## Pd Documentation chapter 1: introduction

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This is the HTML documentation for the Pd computer program. Pd is free and can be downloaded from the internet; go to http://msp.ucsd.edu/software.html to get it.

### 1.1. guide to the documentation

Pd's documentation consists of:

- this HTML manual
- "reference" patches, one for each kind of object in Pd
- "example" patches showing how to do things
- sample C code

This manual has five sections:

1. this overview
2. a theory of operations, explaining how Pd works
3. instructions on installing Pd and getting it to run
4. how to write C extensions to Pd
5. release notes and known bugs

For a list of all the objects you can use in Pd, see the text file, "0.INTRO.txt" in the directory, "../5.reference". To get help on any Pd object you can right click on it; or you can browse the help patches by choosing "Browser..." in the Pd help menu and looking in 5.reference.

The example patches are also available from the "Browser..." item in Pd's "help" menu. They appear in subdirectories named "2.control.examples", "3.audio.examples" and "4.fft.examples." Some additional patches in "7.stuff" might also be helpful.

To get started writing your own C extensions, refer to chapter 4 of this manual.

### 1.2. other resources

There is a very extensive Pd community web site, pure-data.info, which aims to be the central resource for Pd, from documentation and downloads; to forums, member pages, and a patch exchange.

More documentation is avalable on the Pd FLOSS site: en.flossmanuals.net/PureData/ (English) and fr.flossmanuals.net/PureData/ (French).

Most of the interesting news related to Pd shows up on the Pd mailing list, maintained by Iohannes Zmoelnig. To subscribe or browse the archives visit: http://iem.at/mailinglists/pd-list/. This is the best source of recent information regarding installation problems and bugs. It is perfectly reasonable to post "newbie" questions on this list; alternatively you can contact msp@ucsd.edu for help.

the Pd Extended package, maintained by Hans-Christophe Steiner, can be downloaded from the Pd's sourceforge site . All this and much more is described in detail on http://puredata.info/.

Many extensions to Pd are announced on the mailing list. In particular, for people interested in graphics, there is a 3D graphics rendering package, named GEM, based on OpenGL, written by Mark Danks, adapted to Linux by Guenter Geiger, and now maintained by Iohannes Zmoelnig. You can get it from: http://gem.iem.at/, or by installing Pd Extended.

Here are some more external links.