Hands-on with Kling 4.0: scene-native sound effects and dynamic motion coherence

FellMentKE · x · 2026-09-29

Creator FellMentKE tested Kling 4.0's Sound Effects on his own scene and found audio is generated as part of the scene itself, rather than being added in post — a small detail he says changes the workflow of building finished videos from scratch.

In a follow-up, he also stress-tested Dynamic Motions with large-scale movement across the frame. The real challenge, he notes, is keeping characters, environment and camera coherent while everything moves at once — where AI video starts approaching real production quality.

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