Although it's not free, it's the best app I've tried so far for normalizing MP3s on macOS. It handles folders with over 1000 files without any issues. The app works well and does things as expected. It is easy to use.I'd like to be able to change the size (width) of the main window.The only issue detected (which does not prevent normalizing files) is the Importing Files dialog, it remains stuck on Imported Files: 0 even though the process is working in the background because the imported files end up being displayed in the main window.Analyze and Apply dialogs, on the other hand, work fine, the file counter and progress bar work as they should.Tested on macOS Sequoia 15.0.1 and 15.1. iMac 27" 2019 (iMac19,1).

Es la aplicación que siempre uso y sus resultados son muy satisfactorios. Aumenta la ganancia de forma efectiva. He probado varias y Mp3 Gain es la que más me ha convencido. ¡Recomendada!

Es una aplicación para normalizar el volumen de tus canciones y que todas se oigan igual de volumen. Muy buena aplicación

Seems to work well with the leveling part. But dont try to level more that 6 songs at a time. It just collapses. you gotta re open again and do all over again. it would get a 5 star if it was not so unreliable.