Among the interesting U.S. titles are many films from the RKO Library, including several Cary Grant films. However, in the language specifications, some entries read 'English', while other entries read 'English (V.O.)'. Does V.O. mean voice over? If so, I'm confused. I can see where the Spanish audio would be a voice over, because the characters in the RKO films spoke English; thus the Spanish language would be dubbed. But then, why voice over the original English audio? Thanks.