MP3 audio normalizer
Download from PortableApps.com
wxMP3gain Portable can run from a cloud folder, external drive, or local folder without installing into Windows. It's even better with the PortableApps.com Platform for easy installs and automatic updates.
Tired of reaching for your volume knob every time your mp3 player changes to a new song? wxMP3gain analyzes and adjusts mp3 files so that they have the same volume. wxMP3gain does not just do peak normalization, as many normalizers do. Instead, it does some statistical analysis to determine how loud the file actually sounds to the human ear. Also, the changes wxMP3gain makes are completely lossless. There is no quality lost in the change because the program adjusts the mp3 file directly, without decoding and re-encoding.