Pere Portabella is the ghost in the machine of international cinema. The 79-year-old Catalan has directed eight features and a number of shorts over the years, produced Luis Buñuel’s still-shocking “Viridiana’’ (1961) (and briefly became an enemy of the state in the process), has written screenplays, acted in films, and served as a senator and a member of the Catalonian parliament. But because Portabella refuses to release his movies on video, he’s virtually unknown outside his home country.
The arrival of 2007’s “The Silence Before Bach’’ for five screenings at the Museum of Fine Arts thus constitutes an event. Even on its own, though, the film’s a remarkable and quixotic work: a free-floating series of visual essays on what music in general and Johann Sebastian Bach in particular mean to civilization. The links to Buñuel are there for the taking; as opulently measured as this movie is, it also has a playful, even subversive side. “The Silence Before Bach’’ finds beauty everywhere: in the curves of a naked woman, the gait of a dancing horse, and the godlike order of a prelude.