The final album by the ambient duo Stars of the Lid was also a quietly triumphant mission statement in ways, claiming back what was already become a cliched post-rock tag to implicitly argue for something that really was well beyond rock in any form. Their crabby sense of humor well intact — the final song, for instance, was called “December Hunting for Vegetarian Fuckface” — did not obscure the boundless and seemingly bottomless flow of their exquisite layering of drones and treated instruments.