This series of patches serves as a tutorial for Pd's "control" structure, as opposed to its audio functions (covered in the next series.) These tutorials are inspired by Chris Dobrian's Max tutorial patches. It's probably best to look at the first section here before going on to the audio portion, but afterward there's no reason not to browse back and forth between the two, and even the third series on "fft" based techniques. The relationship between "control" and "audio" is described in Pd's HTML documentation, which is more like a reference manual than an introduction. Also, you probably will need to look there to get Pd up and running stably so that you can enjoy the patches here. The patches are roughly divided as shown: 1. objects and connections 2. subpatches, tables, and organization 3. specific techniques.