Recently, my phone has been playing random piano music. It happens around 5-10 times a day or more, I even had it play 3 times in 30 minutes. This is music that I have never heard before, nor have in my play music. It doesn't have a set time it just plays randomly; even when I'm on google , on the home screen or using an app. Turning the phone off will not turn it off. A couple ways I have stopped it playing is swiping down the notification board or shutting the phone down. I have tried deleting all my game apps that I have downloaded that might have caused this but nothing has changed. Is this some kind of virus and how do I stop it? The phone is a Samsung Galaxy S7 with the latest updates.