Apple Lossless Audio Codec (ALAC) now open source

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Apple Lossless Audio Codec (ALAC) now open source

Postby Antony » Thu 27 Oct, 2011 7:27 pm

The lossless codec Apple uses on many of its products is now open source on MacOSForge

The Apple Lossless Audio Codec (ALAC) is an audio codec developed by Apple and supported on iPhone, iPad, most iPods, Mac and iTunes. ALAC is a data compression method which reduces the size of audio files with no loss of information. A decoded ALAC stream is bit-for-bit identical to the original uncompressed audio file.

The Apple Lossless Audio Codec project contains the sources for the ALAC encoder and decoder. Also included is an example command line utility, called alacconvert, to read and write audio data to/from Core Audio Format (CAF) and WAVE files. A description of a 'magic cookie' for use with files based on the ISO base media file format (e.g. MP4 and M4A) is included as well.


One main advantage of using ALAC (over other lossless codec) is that it is supported by popular Apple products. This format had already been reverse engineered.
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