Mp3Trim can clean up, trim, amplify and fade-in/out your MP3s.
Cleaning is useful on most MP3s and reduces the file size. Trimming is useful on files that contain unwanted noises or sounds. Amplifying is useful on low volume MP3s. Note that mp3Trim works precisely on MPEG frame boundaries.
Try this program only for evaluation on processing larger mp3\'s. If you like it, then buy it on their website for only (hahahahahaha) $69.95 or Euro 49.95!!