Editing Macintosh Audio Compression/Expansion

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'''Macintosh Audio Compression/Expansion''' ('''MACE''') is a lossy, proprietary compression scheme developed by Apple Computer for their Macintosh line of computers.
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MACE (Macintosh Audio Compression/Expansion) is a lossy, proprietary compression scheme developed by Apple Computer for their Macintosh line of computers.
  
 
Technically, it's very similar to how [[ADPCM]] works.
 
Technically, it's very similar to how [[ADPCM]] works.
  
It only works on 8bit streams. It offers two compression modes: 6:1 (1/6th of the original file size, 117 kbps) and 3:1 (1/3rd of the original file size, 235 kbps). Quality is relatively poor.
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It only works on 8bit streams. It offers two compression modes: 6:1 (1/6th of the original file size, 117kbps) and 3:1 (1/3rd of the original file size, 235kbps). Quality is relatively poor.
  
 
ffmpeg/libavcodec is able to decode MACE3 and MACE6 streams.
 
ffmpeg/libavcodec is able to decode MACE3 and MACE6 streams.
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* Won't work on bit depths other than 8bit.
 
* Won't work on bit depths other than 8bit.
  
== External Links ==
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==External Links==
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* [http://www.quicktime.com QuickTime] plays and encodes MACE streams.
 
* [http://www.quicktime.com QuickTime] plays and encodes MACE streams.
 
* [http://cekirdek.pardus.org.tr/~ismail/ffmpeg-docs/mace_8c-source.html Reverse engineered MACE decoder sources] by Laszlo Torok, part of ffmpeg.
 
* [http://cekirdek.pardus.org.tr/~ismail/ffmpeg-docs/mace_8c-source.html Reverse engineered MACE decoder sources] by Laszlo Torok, part of ffmpeg.

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