"Volume Flutter" is rapid oscillation of volume in dialogue, music or effects.
Volume Flutter impacts the Technical quality of an asset. Customer experience will be negatively affected as plot-pertinent dialogue may be lost during volume flutters. Volume flutter could possibly be the creative intent. Any derivative of this mix will contain a volume flutter.
Volume fluctuates due to changes in distance of on-screen action, or contextual clues within a scene indicate that it is part of the intended mix elements.
Audio volume fluctuates rapidly in the middle of a scene, where on-screen action or dialogue is intended to be heard.
How to Prevent:
Review audio with the picture to check for contextual clues that indicate volume flutter matches the scene.
Use sound compression adjustments to create a seamless volume in the audio track.
Redeliver affected audio track with volume at a consistent level, or in a level that is not rapidly varying and jarring to listen to.