Fractal music

I started playing around with treating pictures as spectrographs, with time on the x-axis and frequency on the y-axis. I ended up writing a computer program that converts png files to wav files with a good set of options and such. I've found that images with sharp contrasts, and either mostly either black or mostly white (which my program inverts) give the best results. The following recording was made with a rendering of the Mandelbrot set (a fractal):
Mandelbrot.mp3