Enhanced Music CD (Blue Book)

The Blue Book or Enhanced Music CD specification describes the Enhanced Music CD disc format. The first session of an Enhanced Music CD disc contains audio information according the Red Book. As a consequence, existing CD Audio players can playback this first Session as a CD Audio disc. The second session contains CD-ROM data files with content related to the Audio Tracks in the fist Session. The data files will in general contain items like disc and track titles, lyrics, and background information on the music. The second session will only be used by computer systems equipped with a CD-ROM drive, or by special “Enhanced Music CD players”.