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MacMP3Gain is an AppleScript Studio application which brings an Aqua GUI to the command line version of mp3gain, a utility that performs statistical analysis to determine how loud the MP3 file actually sounds to the human ear and performs lossless volume adjustments. MacMP3Gain is free and open source. You may download either the application itself or the entire project including the source code.

Important: MacMP3Gain modifies MP3 and unprotected AAC files. I would highly recommend a full backup of your MP3 library prior to running mp3gain on them.

What's New

Version 2.1:
  • Fixed mixed up Radio Gain Mode and Undo buttons.
  • Fixed progress tracking.
  • Built on Mac OS X 10.6 Snow Leopard - should run on OS X 10.7 (untested).


Mac OS X 10.3 or later

*Previously available here

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Current Version (2.x)


Downloads 19,407
Version Downloads 3,774
License Free
Date 22 Dec 2011
Platform OS X / PPC 32 / Intel 32
Price Free
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