What's around my neck is a MuVo MP3 player, which is my headphones are connected to.

I use it to listen to songs I'm practicing for my bands, and/or to listen to a clicktrack to keep me on time.

In this video, at the beginning, I was searching for the song, then pressed "play", and started playing. At the end I turned it off. The song is what you hear in the background to which I played along.