The stock music app in my 1520 is not playing any music. I've tried adding and removing then adding again the mp3 files but the app just lists the songs down and nothing happens when i click on it. My phone simply goes back to the home screen.
I have installed many third party music player apps, but when I have issues with the stock music player not recognizing my music collection, I use this one musicPlayer 8 free. It seems to be able to find and play music that the others can't!