new port: audio/mp3gain (A tool to normalize the gain of mp3 files)
Tired of reaching for your volume knob every time your mp3
player changes to a new song? MP3Gain analyzes and adjusts
mp3 files so that they have the same volume.
PR: ports/46625
Submitted by: Simon 'corecode' Schubert <corecode@corecode.ath.cx>