This MP 3 Amplifier is used to create amplified versions of music folder on your SD card or external storage at6 any point of time. With this app you don?t need to learn how to use the complicated audio applications like sound forge or mp3 gain any more. This simple app will take care of the problems like adjusting volume increasing needs. It is very useful for audio books. This app is used to amplify all music and don't miss anything while driving or working out. Your phone can be used for its full potential to make those speakers that blast that ringtone with a super loud music sound.