We had a pretty good thread over in Story Games, talking about what kind of music we (would) use to evoke mood in Apocalypse World and use it as background noise in our games.
Today, while taking a long bus ride I was listening to some stuff on my mp3 player that I haven't listened to in a long while, specifically, some tracks off the Blood Axis / In Gowan Ring collaboration album, entitled "Witch Hunt: The rites of Samhain". It's old irish/celtic folk with a modern, dark, neofolk spin. In my mind, it's what the world of the Dragon Killer sounds like.
http://www.youtube.com/watch?v=q3uaubmkZXwThere's also a good rendition of I am Stretched on your Grave on the album, but it's not on youtube, so here's a Dead Can Dance version instead. Although to me it's not as evocative as the BA/IGR interpretation.
http://www.youtube.com/watch?v=Zc-aEYPPe7w"She charmed the fish all out of the sea, she charmed the birds all out of their nests. She charmed her true love? out of? his grave, till he could no longer rest."
"I smell of the earth and am worn by the weather."
"The priests and the friars behold me in dread because I still love you, my love, and you're dead."
Hope it inspires someone.