Ultra Voice Changer
This application will help you change your voice beyond recognition.
First you must record the desired voice message, and then you can apply several types of effects. The program includes more than 10 kinds of different filters, among them the voice of an alien, cyborg, robot, and others
MP3 Amplifier - Amplify MP3 can boost the volume of your MP3 files up to eight times. So, if your music is not loud enough for your taste, this easy to use app will take care of the problem.
Simply select the desired music files, set the amplification factor, and tap the button. The program will create amplified versions of the MP3s in the Music folder on your SD card
Sound Boost mobile software is a mini tweak to increase the maximum volume of devices based on Android OS. Increases the volume not only for incoming calls, but the entire device in general: in the movies, when listening to favorite songs, in other applications and games
PlayerPro DSP pack
PlayerPro DSP pack mobile software for free is a complement to the magnificent music player PlayerPro. It allows you to change the sound for the better when listening through this player. This is done by five band equalizer, bass boost, reverb and virtualization is also available