Xiaomi MiMo-V2-TTS - Xiaomi's Large-Scale Voice Synthesis Model

What is the Xiaomi MiMo-V2-TTS?

Xiaomi MiMo-V2-TTS is a large-scale speech synthesis model launched by Xiaomi for the Agent era. Based on a self-developed Audio Tokenizer and multi-codebook architecture, and pre-trained with hundreds of millions of hours of speech data through multi-dimensional reinforcement learning, the model achieves highly controllable multi-granularity speech style control—precisely adjusting from overall tone to local emotions, supporting intonation transitions and emotional shifts. The model possesses powerful text understanding capabilities, intelligently recognizing punctuation and interjections; it also supports dialects, role-playing, and singing voice synthesis, enabling AI to "understand" and express itself naturally with a warm and soulful voice.

Main functions of Xiaomi MiMo-V2-TTS

• Multi-level speech style controlIt supports precise adjustment from overall style to local emotional expression, and can complete tone shifts and emotional changes within the same sentence.
• Intelligent text understandingIt automatically recognizes punctuation marks, modal particles, emphasis marks, and other format signals, and converts them into natural speech expressions without the need for additional annotation.
• Dialect supportIt supports natural pronunciation of various dialects, including Northeastern Mandarin, Sichuanese, Henan dialect, Cantonese, and Taiwanese accent.
• role playThe model can be stylized to portray characters and mimic the tone of voice of specific characters.
• Singing synthesisIt supports accurate expression of pitch and rhythm, enabling natural and expressive singing.
• High-fidelity timbre cloningThe model can clone specific timbres and maintain high-quality output.

The technical principles of Xiaomi MiMo-V2-TTS

• Self-developed Audio TokenizerThe MiMo Audio Tokenizer is used to achieve efficient discretization representation of speech signals.
• Multi-codebook joint modeling architecture: By using a multi-layer codebook to perform fine modeling of speech, the rich information in the original speech is fully preserved.
• Large-scale pre-trainingUsing hundreds of millions of hours of speech data for speech-text hybrid pre-training, we learn a unified ability for cross-modal alignment and understanding generation.
• High-quality oversight and fine-tuningBased on a small amount of high-quality data for fine-tuning, it achieves generalizable multi-granularity and multi-style instruction control capabilities.
• Multi-dimensional reinforcement learning optimizationThe model is continuously optimized around dimensions such as prosody, sound quality, word expression, timbre cloning, and scene tone, and the generation quality is improved directly by using speech-related reward signals.

Key information and usage requirements for Xiaomi MiMo-V2-TTS

• Model localizationA large-scale speech synthesis model designed specifically for the Agent era, giving intelligent agents the ability to express themselves with warmth and emotion.
• Core ArchitectureBased on the self-developed MiMo Audio Tokenizer and multi-codebook speech-text joint modeling architecture.
• Training data sizeHundreds of millions of hours of voice data.
• technical route: Large-scale pre-training + high-quality supervised fine-tuning + multi-dimensional reinforcement learning post-training.
• Supported languagesCurrently, it covers Chinese and English, with plans to expand to more languages in the future.
• Integrated PlanningIt will be deeply integrated with MiMo-V2-Omni's multimodal understanding capabilities to create a full-modal agent that can see, understand, and tell stories.

The core advantages of Xiaomi MiMo-V2-TTS

• Full-stack Agent Native DesignDesigned specifically for the Agent era, it forms a complete technical loop with the MiMo-V2 series models, enabling end-to-end capabilities from understanding to expression.
• Refined style controlIt supports multi-level adjustment from overall tone to local emotions, and can achieve tone shifts and emotional changes within the same sentence, with industry-leading control granularity.
• Training on ultra-large-scale dataBased on hundreds of millions of hours of pre-trained speech data, it covers a wide range of speaking styles and scenarios and has a strong generalization ability.
• End-to-end intelligent understandingIt can automatically recognize punctuation, modal particles, and emphasis marks in text without additional annotation and intelligently convert them into natural speech.
• Multi-dimensional reinforcement learning optimizationIt directly optimizes through multi-dimensional reward signals such as rhythm, tone quality, word expression, timbre cloning, and scene tone, taking into account both stability and expressiveness.

How to use Xiaomi MiMo-V2-TTS

The plan is to deeply integrate with MiMo-V2-Omni's multimodal capabilities in the future.

Xiaomi MiMo-V2-TTS Comparison with Similar Products

Application scenarios of Xiaomi MiMo-V2-TTS

• Smart assistant voice interactionTo give AI agents a natural and emotional voice, achieving a leap from "being audible" to "having life," making human-computer dialogue more humane.
• Multi-character content creationUsing role-playing capabilities, it generates stylized character voices for audiobooks, podcasts, game dubbing, and other scenarios, reducing the cost of professional dubbing.
• Real-time emotional companionshipThrough fine-grained emotion regulation, it provides context-appropriate voice feedback in scenarios such as psychological counseling, online education, and virtual companionship.
• Cross-dialect service coverageWith the support of multiple dialects, it provides a natural and friendly dialect interaction experience for localized customer service, smart home control, and age-friendly applications.
• Creative entertainment productionUsing vocal synthesis capabilities to assist in the production of entertainment content such as music creation, virtual idol performances, and personalized ringtone creation.