Answer: fadeins

AnswerCrossword Clue
FADEINSEditing room techniques
fadeinsgradual increase in the volume of sound, esp. of recorded or broadcast music, dialogue, or the like, usually starting from complete inaudibility
fadeinsgradual increase in the visibility of a scene
fadeinsa gradual increase in a motion-picture or television image's visibility at the beginning of a sequence
fadeinsFADEIN, a gradual increase in the brightness of an image