Super Audio Compact Disc. New media format developed by Sony and Philips that uses DSD (Direct Stream Digital) for audio rather than PCM (pulse-code modulation). Supports high-bitrate recording at 2.8 MHz and up to
5.1 channels of information. Greater dynamic range and frequency response than a regular
CD. All SACDs required to have 2-channel DSD layer. Some are "
hybrid" discs and have a PCM layer compatible with regular
CD players.