Six Pianos is a minimalist piece for six pianos by the American composer Steve Reich. It was completed in March 1973. Music for Mallet Instruments, Voices and Organ – again – emerged in the same year. The piece is scored for glockenspiels, marimbas, metallophone (vibraphone without resonator fans), women's voices and organ. The piece is in four sections, played without a break, marked off by changes in key and meter.