Super Audio Compact Disc (SACD)

Optical media for storage of stereo and surround sound. It was introduced in 1999 by SONY and Philips. The physical size of the disc is the same as the standard CD. However, the technology is different. The format applies 1-bit technology, the DSD format (Direct Stream Digital). The sample frequency is 2822.4 kHz (64 times the sampling frequency of the standard audio CD).