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I'm looking for some software to increase the volume of a track that I have in m4a (but I know how to convert it to whatever) for osx. Can anyone name such a thing?

I tried macMP3gain but that doesn't seem to help at all.

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You made the m4a file? With what software? There may be solutions within the software you used to make the initial m4a file to increase the volume. – Bon Gart May 1 '12 at 21:42
    
I made the m4a with djay – erikvold May 1 '12 at 21:49
    
DJay appears to have an Auto-Gain feature. This most likely normalizes any major audio differences and levels out different tracks to produce a single, even level. I would disable this feature and boost the gain as much as possible (without distortion) when you output to M4A. See if that gets you louder exports. – Bon Gart May 2 '12 at 1:52

Try Audacity. It's an open-source cross-platform audio editor. I haven't used it for years, but normalizing a signal or at least amplifying it is one of the most basic things you can do. There ought to be a very accessible feature in Audacity to do it.

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