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Old 15th July 2011, 23:50   #8
DJ Egg
Winamp & Shoutcast Team
Join Date: Jun 2000
Posts: 35,852
What's the audio codec being used inside the M4A container for these files which won't play?
Are they ALAC (Apple Lossless)?
It'll say what the audio codec is when you view the file info in Winamp via Alt+3,
ie. under Format Info it'll specify one of AAC LC, HE-AAC or ALAC.

AAC LC and HE-AAC are supported by default.

If ALAC, then you will need to install the ALAC Decoder from the Essentials Pack
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