Metal Machine Music is the fifth studio album by American rock musician Lou Reed. It was released as a double album in July 1975 by RCA Records, but taken off the market three weeks later. A radical departure from the rest of his catalog, Metal Machine Music features no songs or recognizably structured compositions, eschewing melody and rhythm for layers of feedback and distortion at various speeds. A quadraphonic version of the album was produced by playing the recordings both forwards and backwards simultaneously.