'''Audio CD''' is an [[umbrella term]] that refers to many standards of means of playing back audio on a [[CD]] or even a [[DVD]].

==Standards==
'''[[CD]]'''
*[[Red Book (audio CD standard)|Red Book audio]] - the original means of playing back audio on the medium.
*[[5.1 Music Disc]] - an extension to the red book standard that uses [[DTS Coherent Acoustics|DTS]] [[5.1 surround sound]].
*[[Super audio CD]] - A format which competes with DVD-Audio. Also uses a proprietary design that can't be easily mimicked by consumer CD copying software.
*[[MP3 CD]] - A CD which contains MP3 files in [[Yellow Book (CD standard)|data mode]] rather than converted from MP3 to red book mode.
'''[[DVD]]'''
*[[DVD-Audio]] - "Audio CD" can be a misnomer for this format since it uses the same physical shape as a "CD", and plays audio but as a "DVD".{{Fact|date=November 2007}}
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[[Category:120 mm discs]]
[[Category:60 mm discs]]
[[Category:Digital audio]]
[[Category:CD]]
[[Category:DVD]]