Free Lossless Audio Codec

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Free Lossless Audio Codec (FLAC) is an audio compression codec primarily authored by Josh Coalson and Ed Whitney. FLAC employs a lossless data compression algorithm; a digital audio recording compressed by FLAC can be decompressed into an identical copy of the original audio data. Audio sources encoded to FLAC are typically reduced to 50–60% of their original size.[2]

FLAC is an open and royalty-free format with a free software implementation made available. FLAC has support for tagging, cover art, and fast seeking. Though FLAC playback support in portable audio devices and dedicated audio systems is limited compared to formats like MP3,[3] FLAC is supported by more hardware devices than competing lossless formats like WavPack.[2]



Development started in 2000 by Josh Coalson.[4] The bit-stream format was frozen when FLAC entered beta stage with the release of version 0.5 of the reference implementation on 15 January 2001. Version 1.0 was released on 20 July 2001.[4]

On 29 January 2003, the Xiph.Org Foundation and the FLAC project announced the incorporation of FLAC under the banner. is behind other free compression formats such as Vorbis, Theora, Speex, and others.[4][5][6]

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