[Q] Low volume on Jelly Bean (LIB)?

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http://forum.xda-developers.com – Hi, I tried some latest JB ROMs (LIB) and I found out the volume output on the earpiece is low. Compared to all recent ICS ROMs I tried, the volume is really low. Is this a JB issue or what? Is there a way to make the volume louder? Any help would be really appreciated. :) (HowTos)