Analysis of a sound clip.

http://www.youtube.com/watch?v=PpiPEWDwK_Q
In this clip non-diegetic sound is only used in the chase at the beginning. This not only makes the violence more light-hearted and assists in making the sequence more action packed, but it is used to foreshadow the outcome of the struggle. 


The diegetic running and struggling sounds combined with the music gives an impression of a highly action-packed chase. The audience cannot see what is happening behind the wall and therefore the diegetic sounds are slightly confusing, but obviously violent. While this struggle is taking place the music, linking this drama to the 1980s, escalates to climax on Gene Hunt's line, "Would somebody like to gimme a hand dragging this bastard back over?" His way of speaking and tone both match the violent way that the police are represented. Alex Drake, the woman's reply is significant as it poses a question immediately answered by the next scene. 


It is clear that the setting has changed as there is no non-diegetic sound or music to lend atmosphere; this setting is much more realistic and mundane. The police station is much more quiet and as the news broadcast comes on there is an audible change in sound quality, signifying that the reports are being broadcasted and viewed on a television. Where the police station's diegetic sounds are much more realistic than the chase scene, the television sounds are more far-off sounding, and therefore also less realistic. This may not only be to show the use of a television, but also to draw a firm distinction between the action being faced by the police, and the normality of work in the office environment. 


The aforementioned music (No More Heroes - Stranglers) is playing over the chase scene to punctuate the apparently unjust nature of the police. In Alex's opinion the police force is not professional, and this is reinforced by the upbeat music, making the chase and police in general seem less serious. This almost makes a mockery of the police force. Also Gene Hunt's accent and tone are stereotypically associated with rough people or possibly those of lower classes. This denotes that the police are as bad as those they live to prosecute, especially seeing as the audience is aware that the police were the vandals mentioned on the television. 


It is also relevant that at the end, the female voices her pity for the fish, and Gene Hunt, the male figure of authority, dismisses this remark without a though. This mediates men as much more violent and destructive than women.