In an era where AI is becoming a staple in daily communication, it’s crucial that the voices behind today’s AI agents are as dynamic and expressive as the conversations we’re having. That’s why we’re thrilled to introduce OpenVoice, a groundbreaking voice cloning model that is setting a new standard in AI expressiveness.
OpenVoice is a breakthrough in generative AI for speech that provides an unparalleled voice cloning experience for AI agents within the MyShell ecosystem and beyond. Beyond producing high quality audio clips and editing pre-recorded audio, OpenShell gives you the power to infuse an AI avatar with a dynamic, genuine voice, echoing the depth of human emotions and personalities. Gone are the days of expensive, sluggish voice cloning processes. OpenVoice is here to change the game.
Video game characters Well-known characters Original characters Before its public release, OpenVoice powered the backend of MyShell.ai and was used tens of millions of times worldwide. This large-scale, real-world testing was done to ensure a well-optimized, user-friendly experience. And after fine-tuning this technology and retrofitting it with a flexible, no-code user interface, we are now ready to share it with the world!

OpenVoice: The Cutting Edge of AI Expressiveness

OpenVoice’s approach is simple yet revolutionary — we’ve unlocked the power of AI to create voices that are not only true to life but also customizable down to the finest detail. With OpenVoice, you can clone a voice with a mere 10-second sample, bringing an unprecedented level of control over elements like emotion, accent, and rhythm. This innovation isn’t just about replicating voices; it’s about breathing life into AI interactions, making them as rich and varied as human conversations.
More specifically, OpenVoice’s AI voice cloning model enables:

• Decoupled Components for Unmatched Flexibility: Traditional AI voice cloning bundles language, tone color, and style, resulting in monotonous outputs. OpenVoice shatters this paradigm by decoupling tone color from content, language, and style. This means with just a 10-second voice sample, OpenVoice can clone a voice while providing granular control over emotion, accent, rhythm, pauses, and intonation.
• Zero-Shot Cross-Lingual Voice Cloning: A groundbreaking feature of OpenVoice is its ability to perform zero-shot cross-lingual voice cloning. It can clone voices into languages not included in the training dataset, without requiring massive-speaker training data for those languages.
• Open-Ended Integrations and Deployment: The MyShell API enables AI voicebot deployments across a wide range of popular platforms, including Telegram and Discord. This means content creators can now craft customized AI agents to bolster fan engagement and community interaction regardless of where their audiences live.
• Cost-Effective Solutions: Compared to other popular voice cloning solutions like VALL-E, OpenVoice offers superior performance with significantly lower computational costs. We’ve slashed costs by 99% compared to commercial APIs like Eleven Labs, and this level of affordability unlocks countless new opportunities for individual and institutional creators alike.

OpenVoice’s Unique, Open-Source Design

OpenVoice’s model is structured around two primary components: the Base Speaker Text-to-Speech (TTS) Model and the Tone Color Converter. This modular approach unlocks maximum customizability, by ensuring that the component that clones a voice’s unique characteristics (the tone color) is distinct from the part that generates the basic speech (the base speaker TTS model).
The Base Speaker TTS Model handles how the speech sounds in terms of emotion, accent, rhythm, and speaking style, but it doesn’t deal with the unique sound of the speaker’s voice. This means it sets up the general style of how the speech will sound, but not the specific voice.
The Tone Color Converter is what really makes OpenVoice special in copying voices. It uses a complex system (an encoder-decoder structure with something called an invertible normalizing flow) to analyze and copy the unique sound of someone’s voice, known as the ‘tone color’. This part can take the style created by the Base Speaker TTS Model and blend it with the unique voice characteristics of any person. So, it first removes the original voice from the speech and then adds in the new voice you want to clone, making the speech sound like it’s coming from a different person while keeping the style (like emotion and accent) the same.
Due to OpenVoice’s modular design, the model’s base speaker model can also be swapped with other TTS models. And unlike today’s tech giants, we’re making OpenVoice’s source code and model weights publicly available so anyone can jump in and play with what we’ve built. This open-source approach is rooted in our belief that progress thrives on collaboration and transparency. Plus, it’s more fun this way!

Welcome to a New Era of AI Interactivity

With the surge in popularity of text-to-speech Large Language Models (LLMs), we are witnessing an incredible variety of conversational outputs, each more engaging and dynamic than the last. However, to truly elevate these interactions, infusing them with personality and expressiveness becomes imperative. This is where AI voice cloning steps in.
By replicating human-like nuances and emotions in speech, AI voice cloning transcends the barriers of flat, monotonous audio outputs, bringing a new layer of depth and relatability to these conversations. It’s not just about what is being said anymore, but how it’s said, making interactions with AI not just informative but also genuinely engaging and personal. This evolution in voice technology promises to revolutionize our experience with conversational AI, making it more immersive and human-like than ever before.
MyShell’s OpenVoice is more than just an advanced tool — it’s a catalyst for creativity and personalization in the digital world. Whether you’re a language teacher, professional coach, storyteller, podcaster, YouTuber, or Twitch streamer, OpenVoice empowers you to bring AI companions to life with realistic speech. Experience the power of OpenVoice and join us in shaping the future of AI-to-human-powered engagement.