![]() Other lossless codecs, such as FLAC and Shorten, are not natively supported by Apple's iTunes nor the later Music app (either the macOS or Windows versions) or by iOS devices running iOS 10 or below. On May 17, 2021, Apple announced that they would begin offering lossless audio in Apple Music in June 2021, with all lossless music being encoded using ALAC. The Apple Lossless Encoder (and decoder) were released as open source software under the Apache License version 2.0 on October 27, 2011. ![]() On March 5, 2005, Hammerton published a simple open source decoder written in the C programming language on the basis of the work. The codec is also used in the AirPort and AirPlay implementation.ĭavid Hammerton and Cody Brocious analyzed and reverse engineered the codec without any documents on the format. #.apple file format mac os x#The data compression software for encoding into ALAC files, Apple Lossless Encoder, was introduced into the Mac OS X Core Audio framework on Aptogether with the QuickTime 6.5.1 update, thus making it available in iTunes since version 4.5 and above, and its replacement, the Music application. #.apple file format mp4#Partly because of the use of an MP4 container, Apple Lossless does not contain integrated error checking. Still the format has been recommended for older iPod devices based on claims of lower power usage. ĪLAC has been measured to require around four times as much CPU power to decode than FLAC does, with implications for battery life on limited-power devices. Testers using a selection of music have found that compressed files are about 40% to 60% the size of the originals depending on the kind of music, which is similar to other lossless formats. ![]() CAF file type container, though this is much less common.Īpple Lossless is not a variant of AAC (which is a lossy format), but rather a distinct lossless format that uses linear prediction similar to other lossless codecs.ĪLAC also does not use any DRM scheme but by the nature of the MP4 container, it is feasible that DRM could be applied to ALAC much in the same way it is applied to files in other QuickTime containers.Īccording to Apple, audio files compressed with its lossless codec will use up "about half the storage space" that the uncompressed data would require. This extension is also used by Apple for lossy AAC audio data in an MP4 container (same container, different audio encoding). Apple Lossless supports up to 8 channels of audio at 16, 20, 24 and 32 bit depth with a maximum sample rate of 384kHz.Īpple Lossless data is frequently stored within an MP4 container with the filename extension.
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