ZAPPA THE COMPOSER: Zappa messes with musical expectations.

Zappa's great dream was to become a truly revolutionary composer, like his idols Varese and Stravinsky.  His primary interest was really pushing the boundaries of music, specifically what instruments could do (including "non-instruments", like his bicycle on The Steve Allen Show) and the way they sounded together.  He wanted to prove, among other things, that disharmony could sound beautiful, that things needn't sound melodious to be musically satisfying.  Musical satisfaction for him, seemed based on experimenting with music (in quite the same way the young Zappa liked to experiment with homemade explosives).  The process of experimentation means testing the potentials of different combinations of things, in order to prove a point.  Zappa wanted to prove that music didn't need to only sound pleasant.