69 lines
1.9 KiB
Markdown
69 lines
1.9 KiB
Markdown
### ALAC
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<sup><sup>**A**pple **L**ossless **A**udio **C**odec</sup></sup>
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<div style="font-size: 0.55em;">
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- Developed in 2004
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- Fully Open Source, Patent and Royalty Free
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- Decent software support
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- Supports:
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- 32-bit sampling depth
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- 384kHz sampling rate
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- 8 audio channels
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- Typically 50% the size of equivalent PCM audio
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<br>
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<br>
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</div>
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<div style="text-align: center; display: grid; grid-template-columns: 1fr 1fr;">
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<div> <!-- Left pane -->
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<!-- Title -->
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##### Music
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<audio controls src="media/samples/musicalac.m4a">ALAC Music Sample</audio>
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<div style="font-size: 0.33em; line-height: 0.1em;">
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"The Show Must Be Go" by Kevin MacLeod
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Licensed under [CC-BY 3.0](https://creativecommons.org/licenses/by/3.0/deed.en)
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</div>
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</div>
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<div> <!-- Right pane -->
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<!-- Title -->
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##### Voice
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<audio controls src="media/samples/voicealac.m4a">ALAC Voice Sample</audio>
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<div style="font-size: 0.33em; line-height: 0.1em;">
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LibriVox recording of "The Art of War" by Sun Tzu
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Read by Moira Fogarty
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</div>
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</div>
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</div>
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Note:
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Distinct from Alcohol Advisory Council of New Zealand
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Apache 2 license
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Now, let's talk about actual audio codecs.
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ALAC was first developed in 2004 by Apple.
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Although originally proprietary, Apple eventually opened up the standard
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and reference implementation under the Apache 2 license.
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Software support for ALAC is decent. Most modern platforms can play it, although Firefox is
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not one of them.
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It also has decent capabilities, such as a 32-bit sampling depth, 384kHz sampling rate and up to 8 full bandwidth audio channels.
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One thing that many lossless codecs, like ALAC, do, is compress raw audio. Specialzied audio codecs
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are more efficient at this job than say gzip, as they can achieve compression ratios of around 50% without
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any degradation of the audio signal.
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[comment]: # (!!!) <!--------------------------------------------------------->
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