I was reminded of this by Ghost^Bht's procedural texture competition entry. Nice entry, btw!

Anyway, it generates a pseudo "landscape" using the wave spectrum analysis from fmod. You can drag your own song onto the exe and it will play it via command line, or just run the exe directly and it will play a song I wrote. I originally wrote this song on the guitar for a Tankwars game I made in QBasic, and "ported" it to Fruity Loops.

I tried to add it as an attachment, but I guess it's too large. :p
Demo!