MPEG-4 Audio Files

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Glock Perfection
Apr 12, 2005
Washington State
Is there a reason that you can't upload MPEG-4 Audio Files to the Forum? Am I missing something? I get an "invalid file" each attempt. Not one of the upload options and wondering why.
How do I do that? I looked and can't figure out how to convert them. I use iTunes, Windows Media Player and Real One Player. And am proficient with none.

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