The main purpose is to correct low sound with cyanogenMod./! Requires root /!This application is dedicated to Galaxy S2 and Cyanogen.This is not validated on other devices.(should works for other).i will not assume any responsability if it damages your device or your hearing.I use it every day, it change my life.Other version should arrive soon to manage other plateform.Headphone sound is automatic, you have just to listen you favorites musics.I have limit sound gain to 10db to keep good sound.If you have any question, feel free to ask me.