"Missing Effect" is lack of individual, multiple or all sound effects, environmental ambience or production effects within an audio mix. Dialogue or music is still present.
Missing Effects impact the Content Quality of the asset. Customer experience is negatively affected if on screen actions do not have corresponding audio effects or if missing effects cause an important story cue to be unclear. If the effects are not filled throughout program, it can take the customer out of a seamless and natural viewing experience.
On screen effect is missing under a particularly dialogue-heavy or music-heavy scene and is not noticeably distracting. Missing effect corresponds to off screen action, which is not directly plot-pertinent.
Effect is missing where the corresponding on screen action is the focus of the scene, or ambience/ effect fill should be present to make the scene/ program sound natural to the audience.
How to Prevent:
Lock audio tracks that are not being worked on in order to avoid inadvertently deleting track information. Review audio against picture to ensure all on screen action is covered with corresponding effects.
Effects are often found to be missing in secondary audio. M&E QC will help prevent missing effects from being carried over to all dubs sourced from the M&E assets.
Replace missing elements with pre/re-recorded effects from the stage, foley or sound effects.