Audio CD is an umbrella term that refers to many standards of means of playing back audio on a CD.

It may specifically refer to:

Standards

• Compact Disc, an optical disc used to store digital data
• Red Book (CD standard), 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 5.1 surround sound
• Super Audio CD, a format which competes with DVD-Audio
• MP3 CD, a disc that contains MP3 files in Yellow Book format rather than converted from MP3 to Red Book format

See also

• DVD-Audio, a DVD that plays audio