From the Inside Gamasutra newsletter:
"Audio Prototyping with Pure Data" by Leonard Paul
http://www.gamasutra.com/resource_guide/20030528/paul_01.shtml
Interactive game audio requires combining content and code. Unfortunately,
composers often have little control over how the code works and thus how the
audio will sound in the final game. What's needed are tools that let the
composer prototype the audio and show the programmer. One such tool is Pure
Data, an open source program that is extensible, powerful, and, well, free.
--
Levi Burton
http://www.puresimplicity.net/~ldb/