Film Noir. Diagetic and Non-Diagetic.

In this genre, diagetic and non-diagetic sounds would have been used quite frequently. Obviously, non-diagetic sounds would not have been done on the computer because in the 1940's and 1950's this kind of technology wasn't around and therefore there had to be another way of doing this. This way was called floeying. Foley was a way of putting in sound that couldn't have been put in otherwise. This would have been recorded at the time of the film making. For example, stabbing someone would obviously not have been done the way it's written down and therefore the crew had to find a way of putting in this sound. This was done by stabbing a cabbage because it sounds similar. Diagetic sound would obviously have been used to let the viewer hear speech.