At last year’s Academy Awards, “Arrival” won the Oscar for best sound editing. This was not to be confused with the award for best sound mixing, which went to “Hacksaw Ridge.”

This year, the same movies — “Baby Driver,” “Blade Runner 2049,” “Dunkirk,” “The Shape of Water” and “Star Wars: The Last Jedi” — are up for both awards.

So what’s the difference? Isn’t mixing levels a core part of sound editing? Not quite. In layman’s terms, sound editing is about collecting the sounds needed for a film. Sound mixing refers to what is done after they are collected.

The sound editing category used to be known as sound effect editing, which is actually the more apt name. When scenes are shot, typically the focus is almost entirely on getting the dialogue and staging down pat.