samsung galaxy s3 audio issue on some apps (netflix, twc t.v.)

my wife and i just purchased the s3 with the new jelly bean system and used to have the mesmerize. the problem that were both having is when we downloaded the netflix app and the time warner cable live t.v, app they both play the video but there is no sound at all you can adjust your media volume and still nothing. we un-installed and re-installed both apps and still the same problem on both phones. so i downloaded a radio app and it plays just fine so its not a phone speaker issue. has anyone else had this problem and how do u fix it? i have called samsung and netflix and have been told there are no alerts so they will get back to me.

 

thank you.. much appreciated i will stop by there and then give the reset a try..

 

im assuming the reset will erase everything on my phone that i added?