MP3 Gain

MP3 Gain is a simple tool to adjust the volume of mp3/m4a/mp4/mov/m4v files.It analyzes and losslessly adjusts audio files to a specified target volume. Instead of simply peak amplitude normalization, it performs statistical analysis to determine how loud the file actually sounds to the human ear.

Key feature:
-Volume adjustment is completely lossless
-Without re-encoding
-Support batch adjustment
-Easy to use, no professional knowledge

Note: NOT support DRM protected M4A file.