This document discusses the effective use of sound in short films. It explains that sound is as important as video and audiences are more bothered by poor sound than poor cinematography. The three essential sound elements are dialogue, sound effects, and music. Dialogue conveys character and story. Synchronous sounds match the visuals while asynchronous sounds add emotion. Background music provides tone and links scenes. Sound corresponds to emotions and scenes to effectively tell the story and engage audiences. Pre-production planning considers how music will build suspense or show emotion by increasing or decreasing at certain points.