What is audio post-production?
Audio post-production is the sound half of finishing a film. Picture editors decide what you see; the audio post team decides what you hear and how it feels. The work runs in stages: dialogue editing, where every line is cleaned, leveled and matched; sound design, where the world is built from effects and atmospheres; music editing, where the score or the licensed track is cut to picture; and the mix, where all of it is balanced and delivered to the specification of wherever the film will play.
On a feature film these are separate departments with separate rooms. On a brand film they are often one person over a week, but the stages are the same and skipping one shows.
Why it matters
Why audio post-production matters
Sound carries feeling in a way picture rarely does on its own. The same shot of a product on a table reads as a jewel or a toy depending on what is under it. Dialogue that is clean and warm makes a founder sound like someone you trust; dialogue left raw makes the same founder sound like a home video. Audiences do not consciously notice a good mix, which is exactly the point: they notice the film instead.
It is also where delivery lives or dies. Broadcast, streaming and social each have loudness rules, and a spot that is too hot for television or too quiet for a phone gets rejected or ignored. Audio post is where those rules are met.
In practice
How audio post-production works in practice
- 01
The picture is locked first, because every sound edit is tied to frames and a change in the cut means redoing the work. The editor hands over an export of the session with every clip and its original audio, and the dialogue editor begins: removing clicks and hum, smoothing the gaps between takes, replacing anything that cannot be saved with ADR.
- 02
Sound design and music come next, built against the clean dialogue so nothing fights the words. Then the mix: levels, EQ, the stereo or surround image, and a pass for each deliverable. The last step is a review on the kind of speakers the audience will actually use, including a phone.
At RIOT
Audio post-production at RIOT
Our film The Medusa for Tiffany & Co. was shot partly on 16mm, and film does not record sound. Everything you hear in those sections was built afterwards, which is the clearest illustration we have of what audio post is for: the picture sets the mood, the sound makes it real.
Watch out
What people get wrong about audio post-production
Budgeting for it last. Sound is a small slice of a film's cost and a large share of its emotional effect, and it is the first line cut when a project runs over. The other mistake is mixing on headphones alone. A mix that sounds enormous on good headphones can disappear on a laptop, and most brand films are watched on laptops and phones.
A third is changing the picture after the sound has started. Every recut moves the sound work with it, and a client who asks for one more trim at the mix stage is often asking for a day of audio to be redone. Lock the cut, then start the sound.
