Res, a matter.

The Xth Sense software and all the code it depends on is free software. It is a complete, interactive environment for the performance of biophysical music (real time music generated by biological and physical processes of the body).
The software is written in Pure Data aka Pd, and runs on Linux and Mac OS X. With a bit of hacking it can run on Windows too.

The software depends on the xth-sense-lib. This is a large collection of Pd objects designed to capture, analyze, process and playback muscle sounds. In addition, you will need the libraries iemguts (by IOhannes Zmoelnig) and soundhack (by Tom Erbe), which are linked below.
Remember to download the Step by step tutorial, and check the Get Started section of this website (click the tab above).

Downloads

Xth Sense software