Blu-spec CD
Blu-spec CD describes an audio CD variant that was introduced by Sony Music Entertainment (SME) in 2008 .
Instead of an infrared laser , a blue laser is used to produce a Blu-spec CD master , similar to that used for Blu-ray discs . Because of the shorter wavelength, the structures can be produced much more precisely, and the disc produced should have less jitter than an audio CD. However, since the jitter of a CD player only depends on the internal clock generator ( crystal oscillator ), this statement is technically incomprehensible. The sound of a Blu-spec CD cannot be any better than that of an ordinary audio CD that has been pressed without errors, since it does not contain any further information.
On September 28th, 2012 Sony announced the "Blu-spec CD2" as a further development of the Blu-spec CD. The master CD is made from the same material that is used to manufacture wafers for the production of computer chips . This leads to a much smoother surface, which means that audio CDs can be produced even more precisely and with even less jitter. Sony calls this process phase transition mastering .
In contrast to Blu-ray Disc, no blue laser is required for playback. A Blu-spec CD can be played in any normal CD player. Blu-Spec CDs are still compatible with the Red Book standard of audio CDs. In this respect, one cannot speak of an independent CD format.
See also
Web links
Individual evidence
- ↑ Press report ( Memento of the original dated February 6, 2009 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. by Sony Music Entertainment (PDF; 302 kB) (Japanese)
- ↑ Sony Music launches Blu-spec CD2 standard. PS3SACD.com, October 1, 2012, accessed January 12, 2019 .
