Audio cd

Audio CD is a digital optical disc data storage format that was co-developed by Philips and Sony to store and play digital audio recordings. First introduced in 1982, the audio CD became the standard medium for audio playback following the decline of the vinyl record and the cassette tape.

History

The audio CD was first developed in the early 1980s by Philips and Sony in a collaborative effort to create a standardized digital audio format. The first audio CD was produced on August 17, 1982, in a Philips factory in Germany. The first album to be released on CD was Billy Joel's 52nd Street.

Technical specifications

An audio CD can hold up to 74 minutes of uncompressed stereo digital audio. This is encoded in a format known as PCM, at a sampling rate of 44.1 kHz, with 16 bits per sample. Each CD is divided into tracks, which can be accessed individually.

Playback

Audio CDs are played back on a CD player, which uses a laser to read the digital data encoded on the disc. The player then converts this data back into an analog audio signal, which is output to a set of speakers or headphones.

Formats

In addition to the standard audio CD format, there are several other types of CD that can be used to store audio data. These include the CD-R and CD-RW, which can be written to by a computer or a standalone CD recorder.

See also

• Compact Disc Digital Audio
• CD player
• CD-R
• CD-RW

References

Audio cd Resources
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