MP3 Normalizer is an optimal utility for enhancing loudness between unlimited number of songs in your music collection.
Application is able to level volume for thousands files in a time; automatically decide which normalization method to apply (Peak or Loudness normalisation); transfers tags and keeps folders' structure intact for newly created, optimized files.
You also can manage setting for output normalised files: choose preferred bit rate, channel mode, use CRC option and adjust sound quality.
So, just drop your music collection to the application window or icon and enjoy with improved sound of your loved songs.
Download free trial version of MP3 Normalizer for Mac OS X from amvidia.com/mp3-normalizer