Can AI add sound design to a video I have already edited?

Yes. An AI editing agent can analyse an existing picture edit and build a sound-design pass around its actions, transitions, reveals, dialogue, and pacing. The picture cut can remain unchanged while the agent adds and times sound effects on separate audio tracks.

Tell the agent what each sound is meant to do. For example:

“Do not change the picture edit. Add subtle room tone throughout, a short whoosh on the title movement, a heavier impact at the product reveal, and a restrained riser before the final shot. Keep all effects below the dialogue.”

This is more useful than asking it to “add cinematic sound,” because it defines the moments, intensity, and material that must be preserved. After the first pass, give focused follow-up directions such as “make this impact shorter,” “replace this riser,” or “remove the effect under this line.”

With invideo Editor, the invideo agent for editing can work on the existing editable sequence. The Audio workspace provides separate tracks, faders, solo and mute controls for manual balancing. A creator sound-design demonstration shows the agent analysing what happens on screen, placing sound on the timeline, and responding to further direction.

Listen to the complete mix before publishing. Check timing, dialogue clarity, consistency, transitions between scenes, and whether any effect draws more attention than the moment it supports.