"With his 1959 Atlantic debut, The Shape of Jazz to Come, alto player Ornette Coleman helped usher in free jazz and avant-garde jazz. Recording without piano helped liberate the songs of a recognizable chord structure and his harmolodics philosophy sought to to free musical compositions from any tonal center. Coleman also used somewhat inventive instrumentation, such as the double quartet (one quartet on each side of the stereo channel), on albums like Free Jazz. The 2006 live album Sound Grammar is among the 83-year-old saxophonist's better recent efforts."