MP3Gain Express is a program that helps you analyze and, eventually, increase or reduce the volume of MP3 files.
The application comes with an intuitive interface which allows you to understand easily how this tool works.
Since the process is irreversible and it doesn't create any temporal files, I personally advise you to backup your personal files in case you are not satisfied with the result.
The program is designed for those having lots of MP3 files taken from different media or websites and want to equalize the files to a standard volume.
In general, I was satisfied with the result. I tested it on 30 files, but in 6 cases I received error messages. However, the process didn't stopped; it applied the volume modification on all the files, excluding the ones with problems. Except for this issue, I believe that the program is worth trying because it is good and, of course, because it's free.
Pros
- Intuitive interface
- Good equalizing result in most cases
Cons
- Irreversible process
- Error messages received with some files
Gets stuck all the time with Big Sur 11.0.2.
Volume went to "0" on everything after I applied the gain! Can't hear a thing! Lost everything because I did not back them up! 122 mp3 files! It seems so simple so how did it go so wrong?