Can anyone out there explain in words of two syllables what Formal system composition is all about. I was reading an article about Philip Glass's music for the I Ching, and I found a link to a site called ICHINGMUSIC where all 64 hexagrams have been translated, usinf a formal system, into piano duets in a wide variety of keys, time signatures and styles. Trouble is, I can't really get to grips with the explanation they give for the rules of the system. can anyone out there make it a clearer?