This is a recording of music that can be heard in multiple episodes of the TV series: Dexter; specifically the first part of this video from 0:00 - 0:45. This is a piece of background music, so it might not have an official name, but unofficially it can be known as "Our Father", in reference to an episode which it is used in; I think that there used to be another YouTube video featuring a sample of this music, but it has since been removed.
Why was I listening to this? It evokes multiple emotions... emotions of-- I am not completely sure. I makes me start to think, and reflect on memories which are brought forward; some of these memories are recent, and others are from the far past. It could be considered nostalgia, but I disagree with this because I am not usually sentimental about past events - rather the opposite. So what is it? Certain sounds and ambient tracks have this effect on me sometimes.
I apologize if the paragraph above is too much information, but I just had a strong feeling about this.