# Add Sound: Foley From Video

**Track:** Video — beginner → intermediate — Generative AI Video — proposed
**Framework / surface:** ij8 Studio (HunyuanVideo-Foley)
**Level:** Intermediate
**Prerequisites:** Animate Your First Still

**In one line:** Generate synced sound effects from a silent clip.

## Theory, aesthetics & inspiration

Sound is half of moving-image craft, and a silent clip reads as unfinished. Foley—named for Jack Foley, the Universal Studios artist who performed footsteps, cloth, and crockery in sync to picture—is the art of building a world's incidental sound by hand. Video-to-audio models automate the synchronization, analyzing motion and material on screen to generate effects timed to the action. The governing principle is diegetic plausibility: a footfall must land on the frame the foot lands, or the illusion breaks. Sound also directs attention and confers weight, telling the eye what matters. Generated foley closes the loop between what is seen and what is heard.