Friday, 7:30 PM: “RTOS Retrospective” at the Eisenhart Auditorium. Saturday daytime “Organ Crawl” to three historically significant organs in Rochester. Saturday, 7:30 PM: “Metropolis” silent movie accompanied by organist Clark Wilson at Auditorium Theatre. Sunday, 2:30 PM: Simon Gledhill on the Wurlitzer 4/23 at Auditorium Theatre.