The Super Audio CD (SACD) features two disc layers. One layer contains a standard version of the album that works on any CD player. The other layer includes high-resolution stereo and a 5.1 surround version of the recording that works on SACD-compatible DVD players and home theater systems. Both layers employ SACD"s Direct Stream Digital (DSD) encoding process that samples the music 64 times faster than CD for unprecedented fidelity.