U2-TTS
Meaning through voice, warmth in every expression
More than reading text aloud, it interprets tone, emotion, and detail
U2-TTS: Meaning through voice, warmth in every expression
U2-TTS combines human-like details, style and emotion control, and multilingual and dialect capabilities, so the same text can fit both formal business narration and expressive character delivery for different content and brand voices. It also supports async long-text synthesis and rich audio output options, making large-scale production integration practical while balancing quality and usability.
Languages
Dialects
Speaking Styles
Async Long-text Capacity
Core Advantages
More Human-Like
Beyond correct pronunciation, it delivers lifelike tone, emotion, breathing, and laughter details.
Easier to Control
Style / emotion / timbre and multiple parameters are all controllable for fast adaptation to different personas and business tones.
Broader Coverage
Multilingual + multi-dialect capabilities adapt to cross-region content and service reach.
More Scalable
Supports async long-text synthesis and common audio formats for batch generation and production integration.
Technical Highlights
To deliver high-quality speech generation, the model introduces a flow-matching module based on pure causal attention and jointly optimizes it with a neural vocoder, forming an end-to-end inference architecture. This approach preserves naturalness while balancing engineering practicality and generation efficiency for stable production deployment.
Use Cases
Audiobooks and News Narration
Use multi-role, multi-emotion voices to deliver stories, articles, and news with immersive listening quality.
Content Production and Voice-Over
Generate efficient, realistic voice-overs for short videos, explainers, and ads while reducing recording costs.
Customer Service and Outbound Calls
Use human-like tone in intelligent calling and reception to improve engagement and answer rates.
Digital Humans and Virtual Assistants
Give virtual personas natural expressive speech for more realistic interaction feedback.
Capabilities
- Text to speech: Converts text into natural speech for broadcasting, reading, and conversational responses.
- Multi-language and dialect support: Covers Chinese, English, Japanese, Korean, Thai, Vietnamese, Indonesian, and multiple Chinese dialects.
- Style and emotion: Supports multiple Mandarin styles and emotional expressions (for example, joyful, steady, urgent).
- Fine-grained effects: Naturally reproduces human-like details such as laughter and breathing.
- Long-text synthesis: Supports async long text, up to 50,000 characters.
