Patrick Smith has debuted his 2011 short Masks on the Internet. He called upon frequent collaborator, musician Karl von Kries, to work on the films music, but unlike their earlier collaborations, they inverted the workflow. On earlier films like Delivery and Drink, Smith created the animation before von Kries scored the film. With Masks, von Kries composed a score first, and Smith then drew what he heard.
Having known Pat for the past decade, I believe I can say with some degree of confidence that his great love is the plasticity of animated movement. The raison dêtre of his films is a passion for creating animation via the currently unfashionable ritual of flipping thousands of crinkly pieces of paper over a lightbox. And yes, Masks was animated on paper, not digitally.