mpTrim (formerly called mp3Trim) is a compact and convenient MP3 audio file cleaning up, trimming, amplifying and fading-in/fading-out tool from Germany. We can use it to reduce the file size of MP3 music without quality loss; to remove unwanted noises or mute sounds from MP3 file; to adjust the sound volume of MP3; to cut your favorite MP3 and use the clips as your personalized ringtone; and to make a music clip with a fade/fade effect for later merging with other music clips or showing as a demo, etc.