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A specific sync-to-picture effect tied to a visible on-screen action (door slam, gunshot). Also known as Spot effect. A form of sfx kind in audio production.
Within Numonic's Audio Production vocabulary, Hard SFX sits under sfx kind, alongside related concepts such as Designed SFX.
It closely corresponds to Close-up in a related medium. Numonic captures sfx kind like Hard SFX as structured metadata, so sound work stays organised next to the shots it belongs to.
Numonic captures the prompt, seed, and node graph behind each ComfyUI generation automatically, so the result you nailed today is still reproducible next month.