drum_kit.ogg: http://www.freesound.org/samplesViewSingle.php?id=29534  Creative Commons Sampling Plus 1.0 License.
all other ogg files are ireleased under the GPL and were created by:
- Sylvain Dechy
- Jérome blanchard
- julie jules
- chloé tuvuku

Some sounds comes from omnitux:
http://omnitux.sourceforge.net