Answer: dubin

AnswerCrossword Clue
DUBIN

Add to a film, as narration

DUBIN

Do some film editing with voices

DUBIN

Append, as movie sound effects

DUBIN
Add, as dialogue or music.
DUBIN
Add voices to film.
DUBINInsert (music, dialogue, etc.).
DUBINAdd sound to
DUBINSubstitute a voice on a soundtrack
DUBINAdd to a film, as music
DUBINSubstitute, as words
DUBINAdd later, as sound