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Re: Which Audio Formats are supported directly by CoreAudio
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Re: Which Audio Formats are supported directly by CoreAudio


  • Subject: Re: Which Audio Formats are supported directly by CoreAudio
  • From: James McCartney <email@hidden>
  • Date: Thu, 22 Sep 2005 11:40:39 -0700


On Sep 21, 2005, at 1:09 PM, Marc Van Olmen wrote:

Interesting, the Audio File formats on 10.3.9 don't show the AAC,


        'mp4f' = MPEG4 Audio (.mp4)
                   data_formats: 'aac '
        'm4af' = MPEG4 Audio (.m4a)


Does this mean that these file types are not natively supported by coreAudio. But in both cases (Tiger and Panther) coreAudio will use the QuickTime component to do the decompression. Or is coreAudio having it owns decompressor (I guess not) but just trying to be certain....

just a data-format/data-container terminology quibble for clarification: data formats are decompressed. file formats are parsed. mp4f/m4af are file formats. file formats require AudioFileComponent plugins (if they aren't built-in like AIFF, WAVE) which is how mp4f/m4af are implemented. data formats require AudioCodecs.



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References: 
 >Which Audio Formats are supported directly by CoreAudio (From: Marc Van Olmen <email@hidden>)
 >Re: Which Audio Formats are supported directly by CoreAudio (From: William Stewart <email@hidden>)
 >Re: Which Audio Formats are supported directly by CoreAudio (From: Marc Van Olmen <email@hidden>)

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