How to Generate AI Video With Native Sound and Speech
To generate a video with speech and sound in one pass, choose a model that supports native audio and describe the dialogue, delivery, and background sounds alongside the visuals. In Oranzy, Veo 3 and Kling offer native audio capabilities; check the selected model's available audio settings before generating.
Plan a short scene
Start with one speaker, one location, and one or two lines of dialogue. A short scene makes it easier to check lip sync, pronunciation, and sound balance before spending tokens on longer or more complex versions.
Choose the frame for its destination: use 9:16 for vertical social video, 16:9 for a website or widescreen video, and 1:1 or 4:5 for a square or portrait feed. Keep the speaker visible if lip sync matters.
Generate video and audio together
- Open Oranzy video and sign up for 100 bonus tokens if you need an account.
- Select an audio-capable model, such as Veo 3 or Kling, and check that native audio is available and enabled for the selected option. Set the aspect ratio and choose a short duration where available.
- Enter a prompt describing the scene, the exact spoken line, the pace and tone of delivery, and the background sounds. State which person speaks and when.
- Generate the clip, then play it with sound. Check the words, lip sync, effects, and balance. Revise the prompt and generate another version only after identifying the specific problem.
Write a prompt for dialogue and effects
Separate visual and audio instructions so the model has a clear sequence to follow. For example:
Vertical 9:16 video. A barista stands behind a cafe counter, facing the camera. She places a cup on the counter, then says in a calm, conversational voice at a moderate pace: “Your coffee is ready.” Her lips move with the words. Soft cafe chatter and a quiet espresso machine hum continue in the background. Add a light ceramic clink when the cup touches the counter. Keep the dialogue clear and louder than the background. No music.
Keep dialogue short enough to fit naturally in the chosen duration. Use quotation marks for the exact words and describe pauses or emphasis in plain language. For multiple speakers, label each line and specify the order, but test a single speaker first. If stereo output is important, check the generated file and the model's available output settings rather than assuming every option produces the same audio format.
Avoid common mistakes and wasted generations
- Overloaded prompts: Too many speakers, sounds, or actions can compete. Test the main line and one background sound first.
- Dialogue that is too long: If words are rushed or cut off, shorten the line or select a longer duration if available.
- Vague sound instructions: Replace “busy background” with specific sounds and their relative volume, such as “quiet traffic behind clear speech.”
- Changing everything at once: Adjust one variable per retry, such as speech pace or camera framing, so you can tell what improved the result.
- Assuming audio is active: Check the model and audio setting before generating; not every video option necessarily includes a native soundtrack.
Review before publishing
Listen on headphones and on a phone speaker. Check that the full line is intelligible, the effects match the action, and the background does not mask the voice. Verify names, claims, and pronunciation; generated speech may differ from the prompt. If a take is visually strong but the audio is unusable, consider replacing or editing the soundtrack in a separate editor rather than repeatedly regenerating the whole scene.
FAQ
Which Oranzy video models can generate speech and sound?
Veo 3 and Kling offer native audio capabilities. Check the available settings for the specific model option before generating, because audio availability can vary.
How do I make the generated character say an exact line?
Put the line in quotation marks, identify the speaker, and specify when they speak and how quickly. Keep the line short, then listen to the result and retry if words are missing or mispronounced.
Can I add background effects without drowning out the speech?
Yes. Name the effects and describe their volume relative to the dialogue, for example, “quiet street noise behind clear speech.” Listen to the result and reduce or remove competing sounds if necessary.
Is native audio always stereo?
Do not assume every model option or output uses the same channel format. Check the selected model's settings and inspect the downloaded file if stereo is a delivery requirement.