IndexTTS2 delivers industrial-grade text-to-speech with revolutionary zero-shot voice cloning, precise duration control, and authentic emotional expression. IndexTTS2 is powered by advanced GPT technology for production-ready voice synthesis.
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IndexTTS2 benchmark results demonstrating superiority over existing zero-shot TTS models
Superior intelligibility with significantly lower WER across multiple test datasets
Exceptional voice cloning fidelity maintaining timbre and vocal characteristics
Accurate emotional expression recognition matching intended sentiment
Millisecond-level timing accuracy for perfect synchronization
* Benchmark results based on LibriSpeech, VCTK, and proprietary emotion datasets. Performance may vary based on use case.
Experience IndexTTS2's capabilities in professional video dubbing scenarios. IndexTTS2 delivers precise timing and emotional authenticity for production-ready content.
Chinese Drama • Emotional Intensity
Demonstrates dynamic emotional range from anger to subtle sarcasm with perfect lip-sync synchronization in Chinese dialogue.
Historical Drama • Nuanced Emotions
Showcases delicate emotional nuances and refined voice characteristics essential for period drama dubbing.
Animation • English Dubbing
Captures rapid-fire dialogue with character-specific voice quirks and comedic timing in English animation.
Anime • Multi-Character
Demonstrates energetic youth voices with anime-style expressiveness and character differentiation.
All videos demonstrate IndexTTS2's ability to maintain perfect timing synchronization while delivering authentic emotional expressions
Try It YourselfRevolutionary capabilities that set new standards in voice synthesis
Clone any voice instantly without training. Just provide a reference audio and generate speech in that voice with perfect fidelity.
Control speech timing with millisecond precision. Perfect for video dubbing, audiobooks, and synchronized multimedia content.
Industry-first emotion-identity decoupling - independently control voice timbre and emotional expression. Mix any speaker's voice with any emotion using text or audio prompts powered by Qwen3 fine-tuning.
Integrated GPT latent representations ensure stable, high-quality speech generation. Industrial-grade architecture with GPU acceleration, FP16 support, and DeepSpeed optimization for production deployment.
Supports multiple languages with mixed character input. Perfect for Chinese characters and Pinyin pronunciation control.
MIT licensed and fully open-source. Access model weights, inference code, and complete documentation on GitHub.
Discover how IndexTTS2 zero-shot TTS technology transforms industries. IndexTTS2 provides AI-powered voice synthesis and emotional speech generation for professional applications.
Transform video content for global audiences with IndexTTS2's precise duration control and zero-shot voice cloning. IndexTTS2 creates authentic multilingual dubbing that matches original timing perfectly. Ideal for films, TV shows, YouTube content, and e-learning platforms.
Revolutionize audiobook creation with IndexTTS2 emotional voice synthesis. IndexTTS2 generates expressive narration with character-specific voices and emotional depth. Publishers produce high-quality audiobooks faster while maintaining natural storytelling quality.
Build conversational AI with human-like emotional responses using IndexTTS2. IndexTTS2 enables virtual assistants, customer service bots, and smart home devices to communicate with appropriate emotional tone and personalized voice experiences.
Generate dynamic game dialogue and character voices on-demand. IndexTTS2's zero-shot voice cloning creates unique character voices without expensive voice actor sessions. Perfect for indie developers, procedural narrative games, and large-scale RPGs requiring extensive voice content with emotional variety.
Empower accessibility tools with natural-sounding speech synthesis. IndexTTS2 provides screen readers, assistive communication devices, and text-to-speech apps with high-quality, emotionally expressive voices. Helps individuals with visual impairments or speech disabilities communicate more naturally and effectively.
Scale content production with AI-generated voiceovers for marketing videos, podcasts, and social media. IndexTTS2 enables brands to create consistent voice identities across campaigns while maintaining flexibility for different emotional tones and regional adaptations without recording studio costs.
IndexTTS2 built on cutting-edge GPT architecture with industrial-grade performance optimization
Everything you need to know about IndexTTS2 zero-shot text-to-speech technology
Zero-shot voice cloning means IndexTTS2 can replicate any voice from just a single short audio reference (3-10 seconds) without any training or fine-tuning. Unlike traditional TTS systems that require hours of training data, IndexTTS2 uses advanced GPT-based neural architecture to instantly capture voice characteristics including timbre, accent, speaking style, and prosody. IndexTTS2 makes it ideal for rapid prototyping, dynamic content creation, and applications requiring multiple unique voices.
IndexTTS2 features industry-first emotion-identity decoupling, offering unprecedented control flexibility through two complementary methods:
The system modulates pitch variation, speaking rate, energy levels, and articulation style to produce authentic emotional expressions from subtle nuances to dramatic performances.
IndexTTS2 offers millisecond-level control over speech timing through explicit duration modeling at the phoneme level. Unlike standard TTS systems where speech timing is unpredictable, IndexTTS2 allows you to specify exact durations for each phoneme or word, ensuring perfect synchronization with video frames, animations, or music. IndexTTS2 is crucial for professional applications like video dubbing, lip-sync animation, audiovisual presentations, and any scenario requiring precise temporal alignment.
For optimal performance, IndexTTS2 recommends an NVIDIA GPU with at least 8GB VRAM (RTX 3070 or higher) for real-time inference. IndexTTS2 supports FP16 mixed precision for reduced memory usage and DeepSpeed optimization for large-scale deployment. CPU-only inference is possible but significantly slower. IndexTTS2 cloud deployment is supported on AWS, Google Cloud, and Azure with pre-configured Docker containers.
Yes, IndexTTS2 is released under the MIT License, making it fully suitable for commercial applications without licensing fees. You can integrate IndexTTS2 into commercial products, services, or applications, modify the source code, and distribute your implementations. IndexTTS2's open-source nature ensures transparency, customizability, and no vendor lock-in.
IndexTTS2 primarily supports English and Chinese with robust handling of mixed-language input. IndexTTS2 can process Chinese characters with optional Pinyin annotations for precise pronunciation control. For English, IndexTTS2 handles various accents and speaking styles. While trained primarily on these languages, IndexTTS2's zero-shot capabilities may enable reasonable synthesis for other languages when provided with appropriate reference audio.
IndexTTS2 distinguishes itself through the combination of zero-shot voice cloning, precise duration control, and emotional expression in a single unified model. While commercial services like Google Cloud TTS or Amazon Polly offer high quality, they lack voice cloning and precise timing control. IndexTTS2 bridges the gap by offering enterprise-grade quality with the flexibility of zero-shot synthesis, making IndexTTS2 ideal for applications requiring multiple voices, emotional variety, and precise synchronization.
Getting started with IndexTTS2 is straightforward. Try our live interactive demo above to experience IndexTTS2 zero-shot voice cloning firsthand. IndexTTS2 provides comprehensive documentation including installation guides, API references, code examples, and implementation best practices. You can deploy IndexTTS2 on your infrastructure or cloud platform of choice.
Join thousands of developers and creators using IndexTTS2 zero-shot voice cloning to bring their projects to life with IndexTTS2 AI-powered voice synthesis