Reading about some random process used in aleatoric music, I found the Music of Changes and the divinatory process of the i-Ching.
One of the most ancient book of China and one of the most interesting process used in music by John Cage, developing the concept of "performance".
Some really good ideas to introduce aleatory elements into my next project, regarding the interaction between an audience and an artist during a live performance. I have to think about it and how to use the "unpredictable" into a patch, but for now I've coded a simple Max/MSP Patch on the traditional i-Ching processes for the recreation of the 64 exagram symbols. I link HERE the download of the open patch, If you're interested in.
If you'll read something more on this process you'll find also some intriguing and esoteric meanings.