Katechon ArcKeep music out of the shot prompt
Video models with native audio can add music, but you cannot control it across cuts: each clip picks its own key, tempo and volume, and a cut between two clips becomes a cut between two songs. We ask for dialogue and ambience in the shot and add music afterwards over the whole scene.
What we used
| Production | Music | How it was used |
|---|---|---|
| High Note | 9 original songs made with Suno | Mixed into the episodes as story moments; the series is about a singer |
| The Little Fairy Bakery | Eight music set pieces generated with ElevenLabs music | Cued under the music scenes of 30 vertical episodes |
| Dragon Rising | A generated score with six chapter cues plus a sound-effects pack | Gated in the edit so silence lands before each hit |
| Blood Sun: The Fall of Kratos | No music | Shipped as rendered; one of the things we would change |
Loudness
Raw AI clips are quieter than platform norms. Several of our first series shipped at -17 to -19 LUFS with no music, noticeably quieter than the videos around them in a feed. Our later episodes are mixed to about -14 LUFS integrated, so episodes sit at a similar level to the videos around them.
Steps
- Lock the edit with dialogue and ambience only.
- Choose cues per scene, not per clip: one cue should run across several cuts.
- Duck music under dialogue so every line stays intelligible.
- Leave silence before big moments; a hit lands harder after a gap.
- Normalize the finished episode to about -14 LUFS and check the loudest moment does not clip.
- Check the music rights for the platform you publish to; generated music has its own terms.
Where Katechon Arc fits
Arc gives you each episode's dialogue and ambience, plus a Jianying draft export so the music pass happens in an editor on top of the assembled cut.
Arc does not compose music or mix and normalize loudness for you; that is an editor's job after export.