This was just a little experiment in sound visualization. I'm sure your music player probably uses a FFT to graph the frequencies in the music its playing. Those frequencies vary over time, and so I wanted to run the variations in each frequency through a FFT, just to see what it would look like. It doesn't look nearly as awesome as I hoped it might, but all well.
The song in question is Open Source, from http://openmusic.linuxtag.org/
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