The document discusses using sound in a trailer for a horror film called The Human Carvery. It explains that non-diegetic sound like music can be used to add suspense, tension, and scare audiences. The group plans to use slow then menacing music when the butcher appears, no music during murders to build suspense, and fast-paced music during chase scenes. An analysis of the film Scream shows it uses phone call music to build tension, stops music briefly for chilling lines, and mixes hacking/banging noises with eerie music for the scariest parts of the trailer.