built in speaker stopped working

[droidreajoh]

Have had s3 for about a month and love it. Was listening to music via real player app. Disconnected 3.5 from phone and no audio from speaker. Tried stock music player, tried other media and other players all with same result. If I plug 3.5 back in it will play audio through jack. Nothing through speaker. When I go to sound level panel that shows sound for audio system, ringtone, media, notification, everything looks ok NO mute line on any of them. Pulled battery, did restarts, pulled sd card and did restart.
I'm ready for suggestions.

 

[droidreajoh]

Fixed. Uninstalled "sound about" app. Restarted. All good.