In the 1960s in jazz, free jazz and the related form of avant-garde jazz broke through into an open space of "free tonality" in which meter, beat, and formal symmetry all disappeared, and a range of W
Herbie Hancock emerged as an influential pianist in the 1960s both as a leader and as part of Miles Davis's "second great quintet". Later he became one of the most popular jazz fusion artists. Standards composed by him include "Watermelon Man" (1963), "Cantaloupe Island" (1964), "Maiden Voyage" (1965) and "Chameleon" (1973).