CD Extra

Developed by Royal Philips, Sony Corporation, and Microsoft Corporation as defined in the "Enhanced Music CD Specification" ('Blue Book') first published in 1995. It is a multisession Multisession Compact Disc , hybrid CD-ROM XA Compact Disc Read Only Memory eXtended Architecture / CD-DA Compact Disc Digital Audio disc format created by storing CD-DA Compact Disc Digital Audio tracks in the first session and CD-ROM XA Compact Disc Read Only Memory eXtended Architecture data tracks in the second session. Standard CD-DA Compact Disc Digital Audio players will read the first session as if it were a standard 'Red Book' Audio CD, while compatible computers can read the CD-ROM Compact Disc Read Only Memory session. CD Extra (also known as 'CD Plus', or 'Enhanced Music CD') should not be confused with the generic term Enhanced CD Enhanced Compact Disc which refers to all types of hybrid Audio/Data CDs.