This postmodern saxophonist was among the early members of the association for the advancement of creative musicians; he has been as far ranging as anyone in his exploration of musical sound; his 1978 duo album with max roach, birth and rebirth, is just one example:

The correct answer is Anthony Braxton. While Braxton is most often categorized as a jazz musician, he has experimented with music so much that he refers to his style as "creative music," without truly putting a label on it. In keeping with this theme, he has named several of his pieces as if they were diagrams (using numbers and letters) without explaining the meaning behind them. 

They are called independent

Where are the choices?