By Greg Sandow
Updated October 05, 1990 at 04:00 AM EDT

Music levels all ranks; that might be the lesson as an unlikely-seeming collaboration reaches its second installment, Hex’ Vast Halos. The collaborators are the leader of The Church, a big-time band, and a singer-guitarist who was in the much-less-known Game Theory. Their sound could be called alternative pop. The music floats appealingly in a sea of echo, never quite coalescing into conventional melody. B