Autotune is availabe as a plugin for DAWs, but you would probably need to install it. It is a vocal effects unit that is most famous for its pitch correction. So if the vocalist sings slightly sharp or flat, it could correct the pitch to the intended note, but it will also even it out, so there is no variation at all (in the extreme case also no vibrato).
Listening to this version, I know exactly what
@Alicia Willis means, there are literally no dynamics in the voice at all. All the auto tune for the vocals does the same thing as all the over the top compression for the guitars, it just kills all dynamics
.
@Topic:
I was watching this yesterday night:
Just the total opposite from this processed stuff, this is dynamics in its pure form
. And Appetite For Destruction is one of my all time favorite albums anyway.