This afternoon I stumbled upon another one of my recent FM synthesis experiments from November 2, 2008. On that day I recorded eight minutes of output from select randomized programs that I produced using a MaxMSP patch called X.FM. You can hear all of the examples I have posted so far by clicking on the FM Synthesis topic.
This eighth example in the series has some nice rhythmic, pulsating characteristics to it. I edited the sound out from the surrounding audio, then exported it with normalization to boost the levels.