When an audio track arrives unasked
A length request can return more than picture. Where a page states that output includes an audio track, a piece arrives with sound whether or not the brief wanted it, and the duration field is not the field that said so. As of 2026-09-12.
| Arrangement | Where the sound comes from | What the brief has to settle first |
|---|---|---|
| Generated with the picture | The model | Whether the track is usable or has to be replaced |
| Supplied as the driver | The buyer, before generation | The script and the voice |
| Not addressed by the page | Unknown | Nothing; it has to be measured |
Inclusion rule. Arrangements a specification page can describe for audio in its own output. A separate voice product from the same vendor is not recorded from these pages. Order. Most common arrangement first.
1A track that arrives has to be dealt with
If a separate voice recording is going under the picture, a generated track has to be muted or removed, and that is a step in the pipeline rather than an afterthought. If it is kept, it has to be judged, which is a review step nobody scheduled.
No ad surface in this genre states whether an audio track must be present, so the default is neither required nor forbidden. It is simply a property of the deliverable that the length column does not mention.
2Audio-driven output reverses the order of work
Where the picture follows a supplied track, the voice is settled before anything is generated. For a script-led advertisement that is the natural order; for one built around a visual idea it is backwards.
It also explains why those ceilings are measured in minutes. The bound is on how long a file can be handled rather than on how long a scene holds together, and the two figures should not be ranked against each other.
3Silence in the column is not silence in the file
Most pages never raise the subject. That cannot be read as an absence of sound, because an absence is not something a page has to state, and it can only be confirmed by opening the delivered file.
A first request against any new row is worth listening to for that reason. It is one minute of work and it settles a question no page in this genre reliably answers.
A craft note, not a spec. Nothing here is taken from a platform or a vendor, and nothing here should be quoted as a requirement. The sourced material is on published limits. Related: A fixed format, Billing and iteration.
4From brief to placement
For ad work around “Sound with the picture”, SceneMixer's pages explain how its ad projects are produced:
A dish photo is cleaned into a product shot and the ad is built around it.
SceneMixer, An AI Ad for a Restaurant, a Café or a Dish — “Will the dish look like my dish?” (read 2026-10-13)
The final cut ends on an end card: your main image plus four lines — Brand, Product name, Tagline, Call to action. The first two are read from your photo and your brief; the tagline and call to action are written with the script.
SceneMixer, The End Card (read 2026-10-13)