The Compact Disc Digital Audio (CD-DA) was developed by Philips and Sony in the 1970s and introduced on the market in 1982. The specifications of the CD-DA, the "Red Book" (IEC 908), are sold by Philips, but a simplified version can be found under the reference ECMA-130, which can be downloaded in PDF format from www.ecma.ch . The Audio CD contains a maximum of 99 tracks. Each track lasts at least 4 seconds. The tracks are chained together (in the case of concerts) or can be separated with a pause. Each track can be divided into 99 indexes. Usually a track has two indexes, one for the pause and one for the music. The indexes have not really found their place, they could have been used to find highlights in a piece of music.
Blog of a music, sound and audio enthusiast.