Audio Generation for AI Videos
Videos are better with sound. Our new audio pipeline generates synchronized ambient audio, music, and effects for every video — no extra setup required.
Why audio matters
Silent AI videos feel incomplete. Even a subtle ambient track — wind, crowd noise, a musical underscore — transforms a generated video from a tech demo into something you'd actually want to share. Our users told us this was their number one feature request.
How it works
The audio pipeline runs in parallel with video generation. It analyzes the text prompt and the visual content of each frame to produce a synchronized soundtrack. The system generates three layers:
- Ambient audio — environmental sounds that match the scene (ocean waves, city traffic, forest birds)
- Music — a generated musical track that fits the mood and pacing
- Effects — spot sound effects synced to visual events (footsteps, impacts, transitions)
Users can enable or disable audio per generation. When enabled, the three layers are mixed and mastered automatically.
Technical details
We use a transformer-based audio model that's conditioned on both the text prompt and frame-level visual features extracted from the video. The model generates audio at 44.1kHz stereo, then a post-processing step handles loudness normalization and synchronization.
Audio generation adds approximately 3 seconds to the total generation time, regardless of video duration. The extra compute cost is 5 credits per generation.
Availability
Audio generation is available now for all users. Pro users get audio included at no extra credit cost. Starter users pay 5 additional credits per generation when audio is enabled.
Try it out — join the waitlist to get started.