MARC21-007: Sound on medium or separate of motion picture no sound (silent) No sound (silent). # sound on medium Always used when coding a separate sound track which is physically part of the film (e.g., magnetic strip on edge of film base). a sound separate from medium Sound is on a separate medium, designed to accompany the images b E.g., a cassette. unknown Presence or absence of sound on the item is not known. u Published