UlazAI - AI Image & Video Tools
How to Add Audio to Veo 3
Veo 3 and Veo 3 Fast can generate 8‑second videos with synchronized audio. Here’s how to enable it and get the best results. If you want a starting point, adapt one of the Veo 3 prompt examples.
Studio UI
- Select Veo 3 or Veo 3 Fast
- Choose aspect ratio 16:9 or 9:16
- Toggle ‘With Audio’ to ON
- Generate and preview the sound
API
{
"model": "veo3_fast",
"prompt": "Cinematic ocean waves at sunset, slow motion, warm lighting",
"aspect_ratio": "9:16",
"audio": true
}Set audio to true to include background music and SFX. For voice-overs, add narration in post or composite in your editor.
Tips
- Keep motion and mood consistent with the scene
- Use Veo 3 Fast for quick audio iterations
- Export MP4 and mix stems in editing software if needed
Related
FAQ
Can I add voice‑overs?
Veo 3 generates music/SFX automatically. For narration, add a voice‑over in post with your editor or a TTS tool, then mux audio with the MP4.
Are audio results deterministic?
Audio varies per generation. If a take isn’t ideal, re‑generate with the same prompt or adjust mood keywords (e.g., "ambient", "dramatic").
Does audio change the price?
Pricing is in EUR and typically includes audio for 8‑second clips. See our pricing page for current rates. Veo 3 Pricing
Add audio by choosing the right generation or edit stage
If the selected model supports audio, describe dialogue, ambience and timing in the generation brief. If you already have a silent clip, add and mix the soundtrack in an editor so timing remains under your control.
Check lip movement, loudness and rights to music or voices before publishing. Large source files should be compressed or trimmed only after keeping an untouched original.