The only time we ever heard the Little Tramp's voice was in Modern Times (1936) when he sang a nonsense song in a cabaret. If you don't understand the lyrics, it's okay. Nobody does. They are a mishmash of words from several languages with a bit of jibberish thrown in. (Some film historians claim that Chaplin was trying to make the point that actions speak louder than words.) Nevertheless it is rather odd to hear sounds come from the mouth of the silent cinema's greatest star.