Herbert Jeffrey Hancock is an American jazz musician, bandleader, and composer. He started his career with trumpeter Donald Byrd's group. Hancock soon joined the Miles Davis Quintet, where he helped to redefine the role of a jazz rhythm section and was one of the primary architects of the post-bop sound. In the 1970s, he experimented with jazz fusion, funk, and electro styles using a wide array of synthesizers and electronics. It was during this time that he released one of his best-known and most influential albums, Head Hunters.