This has been an issue for me on my Nvidea Sheild K1 tablet for quite a few updates now. Its really interfering with my ability to enjoy the game and I've tried everything I can think of except factory resetting my tablet. I really don't want to have to do that but if its the only thing I can do to fix it then I'll do it. I just need to be sure its all I could possibly do. Its not just music discs its all music, like its muted even though the music files are on my tablet and the music volume is turned up.