Kling is a video generator that can add sound. SFX Engine is built for the sound itself: describe it, pick from four takes and drop the WAV into any edit.
Compared on sound only, using Kling's own guides and pricing.
| Feature | SFX Engine | Kling AI |
|---|---|---|
| Built for | Sound effects, plus music and voiceover | AI video, with sound as one feature |
| Sound from a text prompt | Yes, up to 47 seconds | Yes, in the Kling app's sound effect tool |
| Sound for a video you upload | Not yet | Yes, for short clips |
| Sound made with the AI video | No | Yes, on Video 2.6 and 3.0 |
| Pricing | From $10 a month, about 166 sound effects | From $10 a month for 660 credits, shared with video |
| Also included | Background music, voiceover, stem splitting | Video and image generation |
Kling details are from kling.ai guides and pricing, checked on 7 October 2026.
Make a sound once and use it in any edit. It isn't tied to one generated clip.
Generate up to four versions of a prompt side by side and keep the one that fits the shot.
Ambience and beds run up to 47 seconds, longer than a single Kling clip.
Every sound here came from the prompt on its card.
Ambience“Thunder rolling over a dark sea”
Games“Swords clashing in a stone hall”
Film“A siren echoing through wet city streets”
Games“Arcade chime for a correct answer”
Foley“Boots on gravel, slow walk, close mic”
Film“Waves breaking under an open cliff”
Games“Fairy sparkles for a quest reward”
Podcasts“A forest stream for a podcast intro”
Every plan includes commercial use. Pick the amount of credits you need.
Contact us at support@sfxengine.com
Kling is a video generator, and sound is one of its features. SFX Engine is built only for audio: sound effects up to 47 seconds, four takes per prompt, WAV downloads, plus music and voiceover.
Yes. Download the WAV and add it in your editor next to your Kling clips. The sounds are royalty-free, so they work in commercial projects too.
Not yet. You describe each sound and place it in your editor. If you want sound generated with the video itself, Kling does that.
Yes. Everything you make on any SFX Engine plan is royalty-free for commercial use.
Plans are $10, $25 and $90 a month for 500, 4,000 and 15,000 credits. A sound effect costs 3 credits, so Starter makes about 166 a month.
Describe what's happening on screen.
