kevin_r
I personally feel that Chapter 3's soundtrack might be a bit weaker than those of the other chapters (which is to say it's only very good instead of a complete masterpiece), but Chapter 4's more than makes up for it. The area themes in particular make brilliant use of uncommon time signatures, and everything to do with the chapter's Shadow Crystal holder is excellent as well.
If I had to pick a favorite for Chapter 3 specifically, I'd be torn between "It's TV Time!" and "Black Knife".
Favorite track: The Third Sanctuary.