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Dubbing AI builds a real-time Voice Agent for 10 million users with Fish Audio
Dubbing AI lets gamers, streamers, and creators clone, change, and translate voices. With Voice Agent, the company took that experience a step further, letting AI speak for users in real time. To make it work, Dubbing AI needed TTS that was natural and expressive without sacrificing speed.
Products used Fish Audio S2 Pro Text-to-Speech API
10 million users
500 AI voices
80 + languages supported
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Dubbing AI wanted Voice Agent to feel like a person, not a voice assistant
Dubbing AI had already built a platform around voice. Its users could change their voices in real time, clone them, refine accents, and translate between languages. Voice Agent extended that product in a new direction: the AI could now speak on the user's behalf.
The use cases were immediate. A gamer could have the agent respond during a conversation. Someone who was too busy to make a phone call could have the agent do it for them. Someone who was temporarily unavailable could still communicate in real time.
But the experience only worked if the voice sounded real.
A noticeable pause would make the interaction feel artificial. A flat or robotic response would do the same. For Dubbing AI, real-time TTS wasn't simply a matter of generating speech quickly. The voice needed to sound natural, carry emotion, preserve the speaker's identity, and work across the languages its global users needed.
The fastest model wasn't enough if it sounded flat
Dubbing AI evaluated multiple TTS providers against the demands of the Voice Agent experience. The team narrowed the decision to five criteria: naturalness, emotional depth, voice cloning quality, latency, and multilingual support.
The evaluation created a difficult tradeoff. Models that performed well on latency could lose emotional expression. Models that sounded expressive could introduce delays that disrupted conversation. Others performed well in one language but fell short when users switched languages.
For a product serving more than 10 million users across gaming, entertainment, and commercial use cases, being excellent at only one part of the experience wasn't enough.
Dubbing AI needed a model that could clear every bar at once.
Fish Audio delivers exceptional voice naturalness, rich emotional expression, and reliable low-latency TTS that perfectly underpin our core Voice Agent product experience.
Tiange Ling
CEO, Dubbing AI
Fish Audio was the only model to meet all five requirements
Fish Audio stood out because it delivered the combination Dubbing AI needed for Voice Agent: natural speech, emotional depth, strong voice cloning, low latency, and multilingual support.
The distinction mattered because the criteria were interconnected. Naturalness made the voice believable. Emotional expression made it feel human. Voice cloning preserved the identity of the speaker. Low latency kept the conversation moving. Multilingual support allowed the same experience to work across Dubbing AI's global user base.
Fish Audio supported more than 80 languages with native code-switching, while maintaining the responsiveness required for real-time interactions.
* Naturalness
Speech that sounds human, not synthesized
* Emotional depth
Expression that carries through every nuance
* Voice cloning
Cloned voices that preserve the speaker’s identity
* Low latency
Real-time responses without noticeable delay
* Multilingual support
80+ languages with native code-switching
Fish Audio gives Dubbing AI room to scale Voice Agent
Voice Agent is now moving from a technical possibility to a product Dubbing AI can bring to its global user base. With Fish Audio handling real-time TTS, Dubbing AI can focus on building new ways for its users to communicate while maintaining the speed, expression, and voice quality the experience requires.
The result is a voice agent that doesn't just respond. It sounds like someone you want to keep talking to.
Read more customer stories
HeyGen creators choose Fish Audio three-to-one for voice cloning
Read the case study
Pictoria adds Fish Audio to its voice stack for more expressive Japanese AI characters
Read the case study
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* Compare Us
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Products
* Text-to-Speech
* Speech-to-Text
* Voice Cloning
* Voice Changer
* Story Studio
* Audio Separation
* Audio Translation
* Sound Effects
Solutions
* For Startups
* For Students
* Audiobooks
* Voiceovers
* Character Voices
* Conversational Chatbots
Research
* OpenAudio
* Fish Audio S2
* Fish Audio S1
* Fish Speech
* Fish Diffusion
Resources
* Discovery
* Guide
* API Reference
* Voice Library
* Compare Us
* Affiliate
* Pricing
Company
* GitHub
* Blog
* Support
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- Fish Audio [direct]
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- Enterprise [direct]
- Pricing [direct]
- Contact Sales [direct]
- HeyGen creators choose Fish Audio three-to-one for voice cloning Read the case study [direct]
- Pictoria adds Fish Audio to its voice stack for more expressive Japanese AI characters Read the case study [direct]
- Speech-to-Text [direct]
- Voice Cloning [direct]
- Voice Changer [direct]
- Story Studio [direct]
- Audio Separation [direct]
- Audio Translation [direct]
- Sound Effects [direct]
- For Startups [direct]
- For Students [direct]
- Audiobooks [direct]
- Voiceovers [direct]
- Character Voices [direct]
- Conversational Chatbots [direct]
- OpenAudio [direct]
- Fish Audio S2 [direct]
- Fish Audio S1 [direct]
- Fish Speech [direct]
- Fish Diffusion [direct]
- Discovery [direct]
- Guide [direct]
- API Reference [direct]
- Voice Library [direct]
- Compare Us [direct]
- Affiliate [direct]
- GitHub [direct]
- Blog [direct]
- Privacy Policy [direct]
- Terms of Service [direct]
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