User blog comment:Henzukaya/Dark Souls location theme songs/@comment-667748-20140110152622

Actually, Firelink shrine has some music. Has well as Gwynevere.

For what it's worth, I think you should look in the general direction of Castlevania, the in game's mood usually matches. If you stick to a single game, it will give you an overall homogenous feel. I'm thinking in particular of the N64 one, which has a lot of settings that fit: http://www.youtube.com/playlist?list=PL9EC108E92392460D

I'm thinking specifically: "Castle Center" as general undead burg. "Tower of Sorcery" for Seath. It has that "Magical" feel, as well as a crystalline feel to it too. Or "Tower of Science". "Duel Tower" or "Tower of Execution" for Sen's fortress (both have that "you gonna get crushed" feelling) "Underground Waterway" or "Underground Tunnel" for Depths/Bighttown (they both have that "sewers" feeling).

I'd have also recommended the ClockTower theme, for climbing Sen's fortress, but that's taken.