If one is striving to create a realistic space, the same thing must be done with sound. While I am writing these lines, I can hear church bells ring in the distance; now I perceive the buzzing of the elevator, the distant, very-far-away clang of a streetcar, the clock of city hall, a door slamming. All these sounds would exist, too, if the walls in my room, instead of seeing a man working, were witnessing a moving, dramatic scene as background to which these sounds might even take on symbolic value — is it right then to leave them out?