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Reason? Compatible with mp3 players?
Authored by: carsten on Apr 08, '03 09:37:50AM

AFAIK the AAC encoding used in MPEG-4 is not backwards compatible with MPEG-1 (although AAC can be used with MPEG-2).

Probably most mp3 players can only play MPEG-1 layer III (.mp3) or MPEG-1 layer II (.mp2), maybe some can play MPEG-2 audio files (.m2a). I doubt it if they would even support MPEG-2 with AAC encoding, so that would mean MPEG-4 is out of the question too.

My iPod doesn't play MP4s yet. Maybe (I hope!!) Apple will release a firmware update to allow this whenever full MP4 support is added to iTunes. It seems likely because the mp4 file format was based on the QuickTime file format anyway.

Your guess is as good as mine as to whether such a firmware update would be possible with other portable mp3 players. :/

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