From Wikipedia, "Milford Graves (born August 20, 1941 in Queens, New York) is an American jazz drummer and percussionist, most noteworthy for his early avant-garde contributions in the early 1960s with Paul Bley and the New York Art Quartet alongside John Tchicai, Roswell Rudd, and Reggie Workman. He is considered to be a free jazz pioneer, liberating the percussion from its timekeeping role. In fact, many of his music contemporaries, musician inspirees, and fans world-wide would argue that Graves is perhaps the most influential known musician in the development and continuing evolution of free-jazz/avant-garde music, to date."