Stephen Wolfram created an amazing Mathematical Song Generator. Integrating his mastery math skills with music theory he created an incredible free online midi generator. Stephen Wolfram is the creator of the popular "Mathematica" software which competes with Maple and Matlab.
If people weren't such media whores about their favorite MTV (VIACOM) owned corporate bands this awesome tool would be the most reported phenomenon on the internet. It uses midis, not mp3s, people should get over it. I wish Yamaha Continued its XG 50 and 100 series and added a firefox plugin... Quicktime is so disgusting. Crescendo will do, but it's just so horridly outdated.http://tones.wolfram.com/
Here are some examples that were auto generated. Be sure to play with the Pitchmapping. Lower the pitch some and change the scale.http://tones.wolfram.com/id/GLLDAqb0m4ZuQ8JV8KmOA7rFZeb8Cvt4xNT5LtDjEs33