Pd-extended (Pure Data, by Miller Puckette) is a real-time audio synthesis/processing package. It is one of the "MUSIC N" family members, open source (BSD style) successor of the MAX branch. This package contains the core of Pd and many external objects. The program binary's name is pdextended. Pd-extended is usually based on an older version of Pd. Since version 0.42.5 Pd-extended doesn't conflict any more with Pd. You find an example for $HOME/.pdextended in the usual documentation directory (named "example.pdextended"), which should work as is on most machines and will enable most of the external libraries in pd. To start Pd-extended, type "pdextended" on 32 bit boxes, and use "pdextended64" on 64 bit boxes. ftgl is an optional dependency.