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.Extracted automatically from Aacgain homepage
brew install aacgain
This formula has no dependencies.
This formula is required by Caudec.