I'm pretty sure I've found 049's new theme song XD But actually though, I often have the thought that has a pretty deep voice when he sings and it very soothing but at the same time would be terrifying if you were to hear it in a dark hallway. And this song sums up what I think he would sound like. Also think he might sing this when he 'cures' his patients
This song is done by the incredible Avi Kaplan and is called; 'Change on the rise'