Music in thrillers

Thrillers are types of films known to promote intense excitement, suspense, a high level of anticipation, ultra-heightened expectation, uncertainty, anxiety, and nerve-wracking tension. Thriller and suspense films are virtually synonymous and interchangeable categorizations, with similar characteristics and features. Music is the main aspect of thrillers which creates the tension needed to build the scene, and without it the film would be completely different.


Non-Diegetic (not in the scene/mise-en-scene) :

My personal favourite composer is John Murphy. He has done soundtracks for 28 days later, Kick-Ass and a few others. My personal favourite is "Sunshine (Adagio In D Minor)" because it worked absolutely perfect in correlation with the scene in Kick-Ass.

An example of a brilliant composer for films is Hans Zimmer. He has done many soundtracks for famous films such as Interstellar and Batman the dark knight. One of his most famous songs is "Time" which is on the highly rated film Inception, the 2010 science fiction thriller by Christopher Nolan.  

Diegetic:

From gunshots to typing diegetic sound builds the scene by hearing clearly what is happening.