What I most love on android devices is all the customizations.. So, I ran to change the system sounds on our Galaxy Note 10.1 2014 (P601)..
I found the original system ui ogg sounds on "/system/media/audio/ui"... I successfully changed the PowerOn.ogg - OK
Charger_Connection.ogg - OK
Lock.ogg - OK
Pen_att and det_noti - ok
but when I change the Unlock.ogg, the sound remains the same...
Reading on my researches, Someone tells that the sound can be inside an APK, probably on the Framework-res.apk
Can someone confirm that? Or can tell me another way?