How does the title sequence use editing, mise en scene and sound in "Se7en"?

The title sequence of "Se7en" uses editing. mise en scene and sound to convey specific connotations and set the tone for the rest of the film.

"Se7en" uses a lot of different shots which are only a few seconds long. The cuts are irregular which presents the film as fragmented further illustrating detective Sommorsett's mindset. The different shots are jolted and the main character is presented as a mentally incapacitated detective.  The old film like overlay is unsettling due to the jerkiness of it which although isn't scary it creates a weird almost sadistic tone.

The mise en scene in the opening is odd and the audience becomes confused by the film and therefore intrigued by the film. The various shots of old files and criminal-related props informs the audience of the film's tone.  The different files had words being crossed out in a black marker pen which conjures connotations of death. The black pen compliments the dull colours of the opening scene and casts a negative and cold tone upon the film causing the audience to grasp a vague understanding of the discourse of the film. 

The sound of the opening ties everything together. The opening flips between polyphonic and homophonic textures without warning with a constant hi-hat beat. The changing texture creates connotations of inconsistency. The texture isn't set and the sound often changes whilst utilising the same instruments/sounds. For example the only "normal" instrument to be heard is a drum kit which is twisted and turned into an instrument of a twisted nature due to the other sounds it is paired with. The radio static and the theremin are both unusual sounds not heard in every day life and are therefore alien to most people. This presents the film as unusual itself as the sounds are different which places the film into a category that the audience cannot name which ultimately entices audiences to watch the film due to the unfamiliarity.