Clip

http://www.youtube.com/watch?v=4VgzEgamtVo
social class
sound

Sound can be used to inject a directors or writers portray of a character  gender,social class or sexuality, here the sound is focused on class.This can be heard when the young boy is in his house there is no non diegetic sound, due to the absence of this we the audience get a more sinister impression. Music is generally used to show emotion, no music being played suggests that there is no emotion between the family meaning the boys is purely used to work and make money.
When the boy is walking in the dark many sound motifs are present in the form  of owls, these re-enforce the visual set making sure the audience know it really is the country side, there is also more non diegetic sound in the form of music, its very slow with low instruments, this music gives sinister connotations, possibly suggesting the boy is going to steal something or that he knows what he is doing is wrong. However once the boy looks through the window some new non diegetic music is played, this has a lot better connotations, hinting towards a more inquisitive feeling than one of theft. When the camera is taken to the work seen a more upbeat happier sounding piece of non diegetic music is played, even though people are working hard, this suggests that the people or the upper classes are so pompous that they don't register people of lower class as having emotions mostly boredom and tiredness. This music then changes slightly to music that is even more stereotypical very slow and has fluctuation in the volume.