AACGain

AACGain is a modification to Glen Sawyer's excellent mp3gain program. It supports AAC (mp4/m4a/QuickTime) audio files in addtion to mp3 files. If you are not familiar with mp3gain, stop reading this, and go to http://mp3gain.sourceforge.net.

AACGain normalizes the volume of digital music files using the Replay Gain algorithm. It works by modifying the global_gain fields in the mp4 samples. Free-form metadata tags are added to the file to save undo information, making the normalization process reversable.

AACGain uses the same command-line user interface as mp3gain, and is compatible with the mp3gain Visual Basic GUI.

• Release Date: Aug 4, 2010
• Download(s):
  aacgain_1_9.zip
• Fixed a bug in mp4v2 which caused iTunes music video files to fail with "not a valid mp4/m4a file" error.
• Gives a more meaningful error message when attempting to process Apple Lossless files.
• Built with updated mp4v2 from Google Code, which should build error-free on modern Windows, Mac and Linux systems.
• Built with updated faad2 code, which should build error-free on modern Windows, Mac and Linux systems.
• Built with latest mp3gain version 1.5.2 source checked into CVS, which includes id3v2 tag support.
• MSVC++ solution and project files have been converted to Visual C++ 2010 Express Edition.