Anatomy of a Murder

I think that jazz music was a good choice for Anatomy of a Murder, both because of the genre of movie and what the music was trying to convey. The film is, for the most part, a legal noir, so jazz is a perfect fit for the typical mix of sexuality, mystery and violence. Because jazz is so versatile, it can be used for almost any mood and still be recognizable as jazz music.
While the music in the film was a mixture of both diagetic and underscoring, I felt that no matter how the music was worked into the scene, it was meant to convey the mood of Paul. He is always on the screen when the music is playing, and by using such a distinct style of music, it can always be traced back to him. When Laura is on the screen, the music is sexual and mysterious. When he is returning from his fishing trip, alone and happy, the music is upbeat and energetic.