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Advanced Audio Coding

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AAC is an abbreviation for Advanced Audio Coding. It is a lossy data compression scheme intended for computer audio files. AAC was designed to replace MP3; it offers better sound quality than MP3 at equivalent bitrates, among other things.

AAC is part of the MPEG-4 international standard, ISO/IEC 14496-3. This standard incorporates the earlier MPEG-2 AAC standard.

In April 2003, Apple Computer brought mainstream attention to AAC by announcing that its iPod and iTunes products would support songs in AAC format, and that customers could download popular songs in this format via the internet.

See Also

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