How do you use sound design to make AI-generated video inserts feel violent and real?

Sound design is the multiplier that makes AI-generated inserts feel violent and real: splice the best fragments from multiple generations, speed-ramp artificial-looking clips to 1,000–5,000% in Premiere Pro, then land a hard audio hit — impact, distortion, environmental texture — on every cut so the ear sells what the pixels can't.

Start by generating several takes of the insert rather than hunting for one perfect clip — first-generation AI output is rarely final, and the usable material is usually two or three good seconds inside each imperfect generation. In the invideo agent you can pin a specific output and request variations — "create another one like it, but change X, Y, and Z" — until you have a pool of fragments to cut from; in one documented production, Seedance 2.0 produced the raw ocean and environment inserts this way.

Next, speed-ramp any fragment that reads as CGI at normal speed. Footage that looks obviously artificial in real time becomes usable as an insert or cutaway when you raise playback speed dramatically — the documented production pushed AI-generated energy clips to 1,000%, 2,000%, and 5,000% in Premiere Pro, then cut the fragments into a rapid, chaotic sequence. Velocity hides the artifacts and creates the aggression the shot needs.

Then build the sound design directly on the cut points. Every splice between fragments should carry an audio event — an impact, a low-end thud, a burst of distortion, a whip of wind or debris — so the edit rhythm and the sound rhythm reinforce each other. Underneath the hits, run a continuous environmental bed (room tone, water, wind) across both the AI inserts and your practical footage; carrying the same ambience through the transition is what makes the AI shot feel like it exists in the same physical space rather than pasted in. The same continuity principle applies visually — matching atmospheric cues like haze between adjacent shots keeps the transition believable.

Finish with a color grade pass so the inserts match your practical footage — sound design and color grade together are the required blending steps, not optional polish. If you're generating inserts to intercut with your own shoot, upload stills from that shoot as references before generating so color and contrast are anchored to your practical material from the start, which leaves the grade less work to do.

Watch some of these to see what works for you:

I actually took this into Premiere Pro and I raised the speed by 1,000, 2,000, sometimes 5,000% on some of these clips

— Alex Arfaoui, filmmaker