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.