Documentaries like Died Young Stayed Pretty have explored the world of rock poster printing — a world full of process obsessives and graphics freaks. Among the best in the business are the Minneapolis duo known as Aesthetic Apparatus, whose retina-tingling flats combine vintage scrap imagery, deceptively slapdash overlays and surprising bursts of color, always with some sort of visual twist. (Like a shock of blonde hair spilling out from under a hot rod’s hood, for instance.) They continue to print show posters — including a recent series for The Dead Weather — but have also built themselves into a design powerhouse, providing sharp work for a variety of clients ranging from Harper Collins to Burton snowboards. A collection of their work shows in Nashville as part of Lipscomb’s Visiting Artist Program.