Which term refers to the lip-synced voices of the extras?

• A. Hard sound effect
• B. Key Frame
• C. Lavalier Mic
• D. Group Walla

Answer: (D)

Group Walla is the term for the lip-synced voices of extras used to create realistic background dialogue in a crowd scene. This approach lets many background actors contribute a chorus of indistinct chatter that matches the on-screen action, so the scene feels alive without each line needing to be clearly spoken or individually recorded. It’s distinct from a sound effect, which is a single specific noise, and from a Lavalier mic, which is just a type of microphone worn by a performer. It’s also unrelated to a Key Frame, which is an animation/visual editing concept. In practice, Group Walla helps build believable ambience and pacing, with the voices recorded together or looped and blended in post to fit the scene smoothly.