This may sound silly.. but here goes. I had an HTC Rezound.. When I would listen to music I would hear the message or email notification sound thru the headphones. With my GS4 the notification sounds are thru the phone speaker and not the headphone. Thus if the phone is in my pocket, everyone around me hears it yet if my muisic is loud I dont. I have read and checked all my settings and cant figure this out. Any ideas? Thanks in advance.