Quiet sound after 4.3 update - Samsung Galaxy SIII Since my Samsung Galaxy SIII was updated to 4.3, I have had problems when listening to music.  

The sound is very low when my equalizer turns on. I've already tried to configure the equalizer accordingly, but that doesn't seem to help. I uninstalled the equalizer but the sound is still low.

What can I do? 

Thank you in advance.
So, after a long year trying to figure out what was going on, I have just reset my phone to factory settings and it works perfectly, but I am still not able to determine the cause of that problem.