If you took any example of today’s music, went back in time and told artists/sound engineers they had to faithfully reproduce it with their technology, what could they not do?
Autotune obviously did not exist, so that would probably be out. I’m not sure if they could do the “dubstep” sound (maybe), but what else? I’m sure they could probably do the blow-out bass they have in some of today’s song. It seems to me that the big advances are computerization, but often they are just using that to make the workflow faster, clean it up, etc.