I admire Giorgio Moroder’s super-cheesy ’80s-synth-pop score to Fritz Lang’s silent film Metropolis so much because it works really well with the movie’s predictable, simple story about love and urban class struggle. We must remember that Metropolis was made for a mass audience; it was to the 1920s what Star Wars was to the 1970s. How will GRID, an experimental music collective directed by Jen Gilleran, score this low-art masterpiece of science-fiction cinema? Will its music speak to the popular/dumb content? Or will it speak to its status as a historical document? If the latter, expect the music to be very ghostly and heady. (Henry Art Gallery, 15th Ave NE and 41st St, henryart.org, 7 pm, $10)