Citizen X - Brief research into sound

Citizen X During the opening credits and the first scene beginning the non diegetic sound is used to create an eerie atmosphere as the soundtrack creates ominousity. The first image we see is of the woods, this is a still shot that lasts around one 1:40 and the opening credits are seen over this image. Then we hear the diegetic sound of a train as it gets closer and then enters the image, the train passes and continuity editing is displayed as the scene smoothly changes from the shot of the train to a tractor of the same colour and a similar diegetic sound. The non diegetic music is still being played over the top of the diegetic sounds and this helps the shots link smoothly.