Davies Symphony Hall probably isn’t the first place that comes to mind when you’re considering going to a movie. But that is where two classics come together this weekend: “The Wizard of Oz” and the San Francisco Symphony - playing the soundtrack live, complete with Judy Garland’s original 1939 vocal recordings. For today’s show, attendees may come dressed as their favorite character from the movie.

There will be a costume contest at 6:30 p.m., and preconcert sing-alongs in the lobby at all shows. The Symphony also is offering discounted tickets for children on Friday and Saturday. According to the show’s New York producer, John Goberman, the movie’s music is worth taking a closer listen. “It was composed specifically for the film shot by shot. It’s not music that sort of shows up every once in while.

Much of this film is driven by the music,” says Goberman, who premiered the show in 2005 and also has produced “A Symphonic Night at the Movies” and the PBS concert series “Live at Lincoln Center.” He cites the film’s signature song, “We’re Off to See the Wizard,” as a prime example of the importance of the movie’s score. “That tune comes back in the underscoring that reminds you of the nature of what they’re (the characters are) doing. They’re not singing the song, but the tune comes back.

It happens all the way through the film.” Another example of music setting the tone for the film is when the Wizard tells the Scarecrow that he does in fact have a brain. “The orchestra’s playing ‘Gaudeamus Igitur’ (the Latin academic song at one time commonly played at university graduation ceremonies). It’s on purpose,” says Goberman. Despite his affection for the music of “Oz,” Goberman wouldn’t produce a show just featuring the tunes without also showing the film.