One of the things that makes The Social Network worth seeing again and again (I have now seen it three times) is the way that it perfectly melds all the crucial elements of filmmaking. The direction, the acting, the storytelling, the writing and yes, the soundtrack. The fact that my father called out the soundtrack means that the soundtrack was worth noticing. And how could it not be noticed, it was created by Trent Reznor and Atticus Ross. Each song, a menace. Each chord a dark fuzz that scratches the eardrums. Reznor creates the twisted darkness that Danny Elfman only wishes he could.
But what makes the soundtrack work is not just the soundtrack itself, but how it is used. It's practically a character in the movie. Setting tone, creating emotion and most importantly, moving things along. Songs like A Familiar Taste and It Catches Up With You perfectly capture the darkness of what is unfolding, but do it in such a way as to still suggest progress. It's brooding and uplifting at the same time. And Reznor and Ross' take on In The Hall of the Mountain King, along with Fincher's coverage of the crew race is really something to behold.
I have purchased the soundtrack and I randomly listen to it in the car. Each piece of music brings me back to the film. To each scene. The run across campus. The slo-motion shots of the Phoenix party. The music is literally intertwined with the film. Just as strong as the writing, the acting and the direction. It may be noise to my old man, but it's a pretty damn good soundtrack to me.