Ligeti video is here: http://www.youtube.com/watch?v=X8v-uDhcDyg
I'm somehow disappointed.... I always thought that Poeme Symphonique was a cool composition, in which as your ears adjust to the sounds of 100 metronomes, new patterns and pitches can emerge. But I think the audio quality is not good enough here. They have to compress the audio like that, so it's really a poor demonstration of the composition. I bet that it's a *lot* better live :)
On the other hand, *your* composition is awesome!!!! I freaking love it!
I had made a composition, also inspired by Ligeti, awhile back, in which I used Shepard tones as an instrument (you know the Risset technique for producing a loop which continually decreases/increases in pitch). Well, I took the Risset loop, gapped it into notes and applied a non-linear function which creates random rhythms in it. Also, it's a canon :)
check out my page at: http://czh.zapto.org/composition.html There you will find the freqsweep suite, and freqsweep3.wav (the largest one) has many characteristics similar to yours, such as emergent patterns and the seeming constant continuous changes in pitch. You will probably want to try to download it, and not play it from the site. It will simply take too long.
Chuck