Background music?

[Jessica Sparks]

Recently I've noticed that when I connect to a Bluetooth speaker, heaadphones, or vehicle my phone starts playing a weird tune that I've never heard. I've checked everything and it's not coming from an app or notification. It's on a loop and the only way to stop it is to restart the device. It doesn't stop when I disconnect from Bluetooth either, it just plays through the phone. Any idea what's causing this?

 

[B. Diddy]

Welcome to Android Central! It might help to hear the tune -- someone might recognize it. (But that would mean using another device to take a video of the phone doing this, then posting the video on YouTube, if you're willing to go through those steps.)