All great robot villains have a song in some way shape or form, ie GLaDOS’ Still Alive and Want You Gone from Portal and Daisy Bell by Hal 9000 in 2001 Space Odyssey. I think Auto should be given his own song as well, but I wonder what it would sound like?
Seeing that Auto is mechanical and has the most ultimate monotone, i think hin having a song wouldn’t be all that decent!
Both GLaDOS and Hal 9000 were extremely monotone characters, yet were each managed to be given respective songs of true creativity. Simply saying “Auto shouldn’t have a song” is simply lacking in creativeness, IMO.
Ok, how about some old NES-style song?
You can always use the Auto-tune software to make… Auto’s tune, using dialog from the movie 
Thinking about that makes me think about Satisfaction by Benny Benassi…
I’ve imagined Auto’s tune being an electronic version of “The Imperial March”.
Haha, when I saw this thread topic I thought of Autotuning.
Anyway, I can imagine his tune being very cold and menacing. Very robotic.
Technologic by Daft Punk, maybe?