Hacksaw Ridge (2016), directed by Mel Gibson, is a World War II biographical war film about Desmond Doss, a conscientious objector and medic who received the Medal of Honor for saving 75 men during the Battle of Okinawa. A "dual audio" release typically refers to a version of the film that contains two language audio tracks—commonly the original English and another language (e.g., Hindi, Spanish, or a regional dub)—allowing viewers to switch between them without changing subtitles.
Dual audio refers to a feature in some movie files or streaming services that allows viewers to switch between two different audio tracks, often in different languages. This feature is useful for those who want to watch a movie in the original language with subtitles or in a dubbed language.