Native audio generation
Kling 3.0 doesn't paste audio on after rendering. Dialogue, lip movements, and ambient sound are generated simultaneously — synced to the frame, not approximated.
Kling 3.0 Lip Sync
AI lip sync generates realistic mouth movements synchronized to spoken audio — mapping phonemes to facial motion so characters appear to speak naturally. Unlike traditional keyframe animation (hours per second of footage) or post-hoc dubbing (which often drifts), native lip sync renders speech and video together, eliminating alignment errors at the source.
What you can do
Multi-language dialogue
Generate characters speaking in English, Chinese, Japanese, and more. The lip sync adapts to the phonetics of each language naturally.
Voice tone and emotion control
Prompt the emotional tone — whisper, shout, laugh, cry. Kling 3.0 maps facial micro-expressions to the vocal delivery so the performance feels coherent.
Ambient sound included
Beyond dialogue, Kling 3.0 renders environmental audio — room tone, footsteps, background noise. The full audio landscape, not just speech.
Frame-accurate phoneme mapping
The model maps each phoneme to the correct mouth shape at the exact frame — not approximated over a window. Complex consonant clusters and rapid speech stay precise.
Up to 15 seconds of continuous dialogue
Generate full dialogue clips up to 15 seconds with consistent lip sync throughout. Long enough for an ad read, a product pitch, or a scene of conversation. Chain clips in Flow for extended sequences.
Get started
How to use
1
Open the video generator and select Kling 3.0
Go to Sunra Video and select Kling 3.0 from the model dropdown.
2
Write dialogue directly in your prompt
Include the spoken text in your prompt — for example: *A news anchor looks at the camera and says "Breaking news: the future of video is here."* Kling 3.0 will generate matching voice and lip movements.
3
Set language and emotional tone
Specify the language (English, Chinese, Japanese, etc.) and emotional register (calm, excited, whispering) in your prompt. The model adjusts phoneme mapping and facial expressions accordingly.
4
Generate and review the sync
Click Generate and review the lip sync accuracy. Pay attention to consonant clusters and emotional transitions. Regenerate with adjusted wording if any syllables drift.
5
Download or extend in Flow
Download the clip with embedded audio. For longer dialogue sequences, chain clips in Flow to maintain character identity across cuts.
Built for creators
Whether you're a solo creator, an agency, or a brand — every model adapts to how you work.
Copy & use
Prompt templates
Product spokesperson
A professional woman in a navy blazer stands in a modern office and speaks directly to the camera: "Our new platform saves your team 10 hours a week. Try it free today." Calm, confident tone. Eye contact with the camera. Soft office ambient lighting. 16:9, 10 seconds.
Model: Kling 3.0 · Duration: 10s · Aspect: 16:9
Multi-language pitch (Japanese)
A young man in a casual T-shirt sits at a desk and speaks in Japanese: "こんにちは、Sunraへようこそ。今日は新しい機能をご紹介します。" Natural, friendly delivery. Warm room lighting. 16:9, 8 seconds.
Model: Kling 3.0 · Duration: 8s · Language: Japanese
Emotional dialogue scene
Close-up of a woman sitting on a park bench in autumn. She looks down, then slowly looks up with tears in her eyes and whispers: "I thought you weren't coming back." Soft afternoon light, shallow depth of field. 16:9, 10 seconds.
Model: Kling 3.0 · Duration: 10s · Tone: Emotional whisper
News anchor read
A male news anchor in a dark suit behind a studio desk reads: "In a breakthrough announcement today, researchers demonstrated the first fully autonomous AI video generation system." Professional, authoritative tone. Studio lighting, teleprompter eye line. 16:9, 12 seconds.
Model: Kling 3.0 · Duration: 12s · Tone: Professional
Who it's for
Use cases
Multi-language product demos
Generate the same product spokesperson delivering your pitch in English, Japanese, and Spanish — each with native lip sync. No voice actors, no dubbing studio, no re-shoots.
Talking-head social content
Create AI presenters for TikTok, Reels, and YouTube Shorts where the character speaks directly to camera with natural lip movement. Publish daily without filming.
Podcast and blog visualization
Turn written content into a video where an AI character delivers the key points with synced speech. Repurpose blog posts and podcast transcripts into video without a studio.
Dialogue-driven short films
Write a script, generate each character's dialogue as a separate clip, and edit them together. Kling 3.0's multi-shot mode keeps characters consistent across cuts.
Compare
Kling 3.0 Lip Sync vs Alternatives
| Kling 3.0 Native Lip Sync | Traditional / Other Tools | |
|---|---|---|
| Sync method | Audio and video generated together — sync is built-in | Audio added in post — requires manual alignment or separate tool |
| Setup time | Zero — describe the dialogue in your prompt | Record audio → import → align → render (30+ min per clip) |
| Multi-language | Native phoneme mapping per language | Requires separate dubbing tool or manual re-recording |
| Emotion control | Facial micro-expressions match vocal tone automatically | Manual keyframing or limited preset emotions |
| Cost | Included in standard Kling 3.0 generation credits | Separate tool subscription + voice actor fees |
Get the best results
Tips & best practices
Keep characters facing forward
Lip sync accuracy is highest at 0–30° from frontal. Beyond 45° profile angle, mouth shape fidelity drops. If your shot requires a side angle, keep dialogue to simple sentences.
Write natural spoken language
Prompts with natural speech patterns produce better lip sync than literary or overly formal text. Read your dialogue aloud before prompting — if it sounds stiff spoken, it will sync poorly.
One speaker per clip for best results
Single-speaker clips produce the most accurate lip sync. For conversations, generate each character's dialogue separately and cut them together in Flow or your editor.
Specify language explicitly
If your dialogue is non-English, state the language in the prompt (e.g., "speaks in Japanese"). This activates the correct phoneme set and improves sync accuracy for that language.
Community
Loved by creators worldwide
Join thousands of creators, agencies, and brands who use Sunra every day.
FAQ
Questions & answers
What is AI lip sync?
AI lip sync is a technique where a model automatically generates realistic mouth movements synchronized to spoken audio. Instead of manually animating each frame, the AI maps speech phonemes to facial motion in real time.
How does Kling 3.0 lip sync work?
Kling 3.0 generates audio and video simultaneously. The model understands the relationship between speech phonemes and mouth shapes, producing synced lip movements as part of the video render — not as a separate post-processing step.
Can I upload my own audio for lip sync?
Currently, Kling 3.0's native audio is prompt-driven — you describe what the character says and the model generates both voice and synced lip movement. For custom audio dubbing, use Sunra's audio tools.
How accurate is the lip sync?
Kling 3.0's native lip sync is frame-accurate for most dialogue. It handles complex consonant clusters and multi-syllable words better than models that add audio in post. Accuracy is highest for frontal face angles.
What languages does Kling 3.0 lip sync support?
English, Chinese, Japanese, and more. Each language uses its own phoneme set for lip shape mapping. Specify the language in your prompt for best results.
How does Kling 3.0 lip sync compare to HeyGen or Synthesia?
HeyGen and Synthesia focus on avatar-based talking heads with uploaded audio. Kling 3.0 generates both the character and the voice from a text prompt — no audio recording, no avatar setup. The trade-off: Kling produces cinematic video, not a webcam-style avatar.
Is Kling 3.0 lip sync free?
Yes. Free daily credits cover Kling 3.0 including its native audio and lip sync capabilities. No separate feature charge. See pricing for subscription details.
Can I control the emotion in lip sync dialogue?
Yes. Include emotional direction in your prompt — "whispers nervously", "shouts excitedly", "speaks with quiet sadness". Kling 3.0 adjusts both vocal tone and facial micro-expressions to match.