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'''[[MPEG-1]] Audio Layer 3''', more commonly referred to as '''MP3''', is a [[digital audio]] [[Encoder|encoding]] format using a form of [[lossy data compression]]. It is a common audio format for consumer audio storage, as well as a [[de facto standard]] encoding for the transfer and playback of music on [[digital audio player]]s. MP3 is an audio-specific format that was designed by the [[Moving Picture Experts Group]]. The group was formed by several teams of engineers at [[Fraunhofer Society|Fraunhofer]] [http://www.iis.fraunhofer.de/EN/bf/amm/mp3history/mp3history01.jsp IIS] in [[Erlangen]], [[Germany]], [[Bell labs|AT&T-Bell Labs]] in Murray Hill, NJ, USA, [[Thomson SA|Thomson-Brandt]], and [http://fr.wikipedia.org/wiki/CCETT CCETT] as well as others. It was approved as an [[International Organization for Standardization|ISO]]/[[International Electrotechnical Commission|IEC]] standard in 1991.
The use in MP3 of a [[lossy data compression|lossy]] [[audio data compression|compression]] [[algorithm]] is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners, but is not considered [[high fidelity]] audio by [[audiophiles]]. An MP3 file that is created using the mid-range [[bit rate]] setting of 128 [[kbit/s]] will result in a file that is typically about 1/10th the size of the [[Red Book (audio CD standard)|CD]] file created from the original audio source. An MP3 file can also be constructed at higher or lower bit rates, with higher or lower resulting quality. The compression works by reducing accuracy of certain parts of sound that are deemed beyond the [[auditory]] resolution ability of most people. This method is commonly referred to as [[psychoacoustics|perceptual coding]].<ref name=Jayant1993>{{cite journal
| doi = 10.1109/5.241504
| author = Jayant, Nikil; Johnston, James; Safranek, Robert
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