Normalize the sound levels of your entire MP3 collection all at the same time, folder-by-folder or file-by-file. Set the normalization volume as low or as high as you see fit.
MP3Gain is a very useful program that can help you normalize the volume of your MP3 files. With this program you can level the music with different volume levels.
You only need to make a single click for the program to start normalizing your MP3 files. MP3Gain allows you to add whole folders with MP3 files to the list or you can add MP3 files one by one. The speed of the normalization process is also very good. It takes just one minute to normalize a 5-minute long MP3 file. The program also enables you to customize the normalization level. You can play your original files and the normalized files using the built-in audio player to hear the difference and measure the power of this tool. Audio quality even seems better after normalization. The size of your normalized MP3 files will be same as of the original files. So you don’t need to worry about it, really.
There is hardly anything else to say about the tool: there's just a file list and playback controls - so it is safe to assume the program is very easy to use.