Frank Vincent Zappa (December 21, 1940 – December 4, 1993) was an American musician, composer, activist and filmmaker. His work was characterized by nonconformity, free-form improvisation, sound experiments, musical virtuosity, and satire of American culture. In a career spanning more than 30 years, Zappa composed rock, pop, jazz, jazz fusion, orchestral and musique concrète works, and produced almost all of the 60-plus albums that he released with his band the Mothers of Invention and as a solo artist. Zappa also directed feature-length films and music videos, and designed album covers. He is considered one of the most innovative and stylistically diverse rock musicians of his era.
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I don't believe in total freedom for the artist. Left on his own, free to do anything he likes, the artist ends up doing nothing at all. If there's one thing that's dangerous for an artist, it's precisely this question of total freedom, waiting for inspiration and all the rest of it.