FrAid MIDI Capabilities
What is great about MIDI is that it lets you turn any numeric sequence into music.
Of course there are many ways to do this and not all of them result in pretty music.
Some FrAid plugins (currently Julia, Mandelbrot and Orbit) have the capability to extract numeric
sequences from the mathematical structures they work with and pass those to the MIDI subsystem for playback
or further processing.
final.mid is a silly mix of scores generated with FrAid.
The MIDI Demo Page has some examples of FrAid plugins generating music. Click anywhere in the Graphics Panel and depending on the mouse coordinates a different numeric sequence will be generated/played. Try different points (usually the borders of the fractal sets sound interesting) and different formulas. The applet will not let you save the sequences you generated so if you want to do that you need to download and install FrAid.