Johannes Kreidler took the data from recent stock charts, fed it to Microsoft Songsmith, and produced melancholy tunes. It's like the Visualizer in iTunes, only backwards. Ben Fry says of the project:
My opinion of Songsmith is shifting -- while it's generally presented as a laughingstock, catastrophic failure, or if nothing else, a complete embarrassment (especially for its developers slash infomercial actors), it's really caught the imagination of a lot of people who are creating new things, even if all of them subvert the original intent of the project. (Where the original intent was to... create a tool that would help write a jingle for glow in the dark towels?)