There are many alternatives to Normalize for Linux if you are looking for a replacement. The best Linux alternative is wxMP3gain, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Normalize and five of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Normalize are QMP3Gain (Free, Open Source), easyMP3Gain (Free, Open Source), QtGain (Free, Open Source) and AACGain (Free, Open Source).
A free automatic mp3 volume normalizer. MP3Gain analyzes and adjusts mp3 files so that they have the same volume. There is no quality lost in the change because the program adjusts the mp3 file directly, without decoding and re-encoding.
Graphical user interface front end supporting MP3Gain engine which analyzes and losslessly adjusts mp3 files to a specified target volume. A complete re-creation (made in QT4) of the original MP3Gain GUI, however it can be run on more platforms.