Alright, here's my first serious PD patch. This basically does the same thing that the srs-wow effect does in windows media player as well as the srs-iwow effect in itunes. (considering srs-wow used to be a licensed product that people had to pay a large amount of money to license, this was stupidly easy to recreate...)
Artificially increases the depth and width of a stereo track (will not work on mono tracks).
It sounds pretty nice!
How this works: Essentially we are taking a stereo track, converting it to a mono stream, inverting it, and rendering it mixed with the stereo track again. I figured this out from a friendly user over at the audacity forums here: http://goo.gl/EfLTIf
Just click the bang, open a wav file and hit start!
EDIT: Also, I'm pretty sure its safe to say this file can be licensed as Public Domain.