By Mohammad Owais
4 December 2025
Major new capabilities have now been added to Google’s flagship video-generation model, Veo 3.1, which is able to generate accompanying audio directly from text instructions. The upgrade means that Veo can move past silent cinematic visuals, giving a full range of controls for dialogue, soundscapes, and ambient effects within one prompt.
The feature targets filmmakers, marketers, educators, and creators who want faster end-to-end video production without relying on external audio tools.
How the New Audio Generation Works
WithVeO 3.1, creators can embed clear audio instructions inside their prompts, and Veo 3.1 will generate synchronized sound, including:
- Spoken lines or character dialogue
- Environmental ambiance: rain, traffic, wind, crowd noise
- Musical undertones and mood-matching background audio
- Precise sound effects: footsteps, door creaks, camera clicks, mechanical sounds
Google shared the following guidelines for best results:
- Set Off Exact Speech with Quotation Marks
Example: “Welcome to our mission briefing”
This ensures that Veo generates the exact line in the intended tone.
- Describe Sound Effects Clearly
Authors should indicate actions such as:
- “soft footsteps on gravel,”
- “a distant train horn,
- “metallic clanging as robots move”
- Define the Background Soundscape
Sound environments can be set with phrases such as:
- “quiet city ambience,
- “calm rainfall,
- “cinematic orchestral background.”
This provides Veo with full context to layer in audio that matches the mood and pacing of the video.
Why It Matters
With Veo 3.1, Google presses further toward full AI-powered film generation and less reliance on additional voiceover, SFX, or audio-editing tools. This means for creators, marketers, and studios:
Faster production timelines More consistent stylistic output Fewer dependencies on outside editing software Easier creation of prototypes, storyboards, advertisements, and social videos Veo’s shift to multimodal synchronisation also positions Google competitively against the emerging video-AI models with integrated audio capabilities.
