I just found a couple of songs from the album on YouTube, sounds a bit swingy for that sort of music (if that's the right word).  I like the sound, but I don't like the style for that sound because it sounds too happy to belong to those tones.  Bear in mind I don't even know enough about this music to know the exact genre of those tracks.

Out of curiosity, what genre (or subgenre) is it?
I noticed there's quite a few when it comes to Metal.