Super Audio CD Super Audio CD Super Audio CD (SACD) is a read-only optical disc for audio storage, introduced in 1999. It was developed jointly by Sony and Philips Electronics, and intended to be the successor to their Compact Disc (CD) format. While the SACD format can offer more channels (e.g. surround sound), and a longer playing time than CD, research published in 2007 found no significant difference in audio quality between SACD and standard CD at ordinary volume levels. Having made little impact in the consumer audio market, by 2007, SACD was deemed to be a failure by the press. A small
John Leigh Philips Philips himself became involved in the textile industry. For a time he was in business with his brother Francis, who outlived him, dying in 1850. As a young man Philips frequented the "Roscoe Circle" in Liverpool—the intellectual group around William Roscoe—meeting there William Paulet Carey, James Currie and Daniel Daulby. In late 1803 Philips was granted command of the First Regiment of the Manchester and Salford Corps, a volunteer militia which served as part of Britain's Home Guard during the French Revolutionary Wars. His brother Francis was appointed to a subordinate role in the same Corps alongside three of his