ATRAC Advanced Lossless

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File Format
Name ATRAC Advanced Lossless
Ontology
Extension(s) .aa3, .at3, .oma
Released 2006

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Description

ATRAC Advanced Lossless (AAL) is the most recent addition to the proprietary Advanced Transform Acoustic Coding family of audio codecs developed by Sony. It is most commonly used for storage and playback of audio on MiniDiscs. AAL uses "scalable" compression - an AAL file contains a lossy ATRAC3 or ATRAC3plus stream and a stream of correction data which can be combined with the lossy stream to reproduce the original data.

The format is supported by Sony MiniDisc players and some of the Sony Walkman range (usually older players).

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