This article explains how to make all of your MP3 files play at the same volume, without losing quality, using a free audio normalization program called MP3Gain. The instructions here apply to Windows PCs, but Mac users have a similar utility called MP3Gain Express for Mac.

Most of the default settings in MP3Gain are optimal for the average user; the only recommended change is how files are displayed on the screen. These instructions show you how to configure MP3Gain to display only filenames. (The default display setting shows both the directory path and the filename, which can make working with your MP3 files difficult.)

Download and install MP3Gain.

Select the Options tab at the top of the screen.