Dont ask me if its core, the area is called whitespace.
OST music, whitespace swarm
http://www.youtube.com/watch?v=zBnsYC4hHZM
OST music, witespace ambient
http://www.youtube.com/watch?v=Bjq9VmL_OXU&feature=related
Its a level beyond tier 3. lets get ready >:D
p.s if anyone is curious, i found this while browsing youtube on SK musics ; p