I'm on a new compilation released by Audiobulb Records, Volume 3 of the Root of Sine. All the tracks on these Root of Sine releases follow one primary rule, the only starting sound that can be used is a 440Hz sine wav.
I took the sine wav and transposed it, looped it, multiplied it and processed it in an amazing little program called Audiomulch. What I ended up creating is what Audiomulch calls a metasurface, which maps certain parameters (which I specify) to certain locations on colour coded surface. So the track was created entirely by dragging my mouse around the metasurface, with no editing or much post processing. A very fun way to create music.
Check them out, they're all available for free download, scroll to the bottom of the page. It's pretty amazing listening to these tracks knowing that they were all created from this very simple starting sound. I especially like the releases by Ultre, truly amazing work, also Austin Martin's track is very nice.