This summer, and for the first time in 40 years, the BAM Harvey Theater is getting a movie screen. This week the Steinberg Screen at the BAM Harvey Theater debuts as the largest movie venue in Brooklyn — the screen is 35 feet by 19 feet and the theater seats 834. BAM also outfitted the Harvey for film viewing with 42 surround sound loudspeakers permanently mounted to the side and rear walls of the theater, as well as adjustable acoustic panels. The giant screen (which can show 3-D movies as well) will first be put to use on the opening night of BAMcinemafest, on June 19. Then throughout the summer BAM will screen the silent film series The Hitchcock 9, with live music accompaniment, special sneak previews, first-run summer films, and classics like Lawrence of Arabia and The Godfather.