Jack Nugent of film deconstruction channel Now You See It explores the way that sound design in cinema (most of which happens long after the cameras stop rolling) is less about creating realistic or believable sounds and more about manipulating and amplifying the emotion of scenes.
A really very-crisply-edited-indeed exploration of the trademark soundscapes of director Quentin Tarantino by Jabob T. Swinney.
A short film by Louis Morton (his graduation piece from the University of Southern California) uses an atmospheric soundscape recorded in Los Angeles and Tokyo to evoke the simmering organized cacophony of city life.
If you have headphones handy, now would be the time.
