In the current era of rapid AI development, voice synthesis technology is innovating at an unprecedented pace. As a breakthrough product in this field, Fish Audio S1, created by the open-source team behind So-VITS-SVC and Bert-VITS2, not only generates highly natural speech but also captures the emotion and subtle nuances of human speaking, setting a new standard for the AI voice domain.
1、What’s Fish Audio S1?
Fish Audio S1 is a Text-to-Speech (TTS) and voice cloning model trained on over 2 million hours of audio data. The model utilizes an innovative Dual-Autoregressive (Dual-AR) architecture and Reinforcement Learning with Human Feedback (RLHF) technology to generate speech results that are virtually indistinguishable from real human voices.
This model has topped the TTS-Arena leaderboard, becoming the new benchmark in the Text-to-Speech field.
The core breakthrough of Fish Audio S1 lies in its ability to capture and reproduce the emotion, rhythm, and tone variations in human speech. According to its development team, this technology can clone any human voice and completely retain the original accent, intonation, and rhythm, reproducing individual speaking habits and emotional characteristics, making AI-generated voices no longer cold, machine-like utterances, but expressions full of soul.
2、Fish Audio S1’s Main Features
Highly Natural Voice Output
Based on massive training data, Fish Audio S1 generates speech that is fluent and realistic, almost identical to human voice-overs. This feature makes it widely applicable in professional scenarios such as video narration, podcasts, and character voices in games.
Accurate Voice Cloning Capability
With only about 10 seconds of a voice sample, S1 can clone any human voice. It not only copies the timbre but also fully preserves the original accent, intonation, rhythm, and individual speaking habits, achieving high-fidelity voice reproduction.
Rich Emotion and Tone Control
The model supports over 50 types of emotion and tone markings. Users can flexibly adjust the emotional color and tonal changes of the voice through simple text commands or natural language instructions, and even add subtle sound effects like laughter or sighs.
Powerful Multi-language Support
Fish Audio S1 supports 13 major languages, including English, Chinese, Japanese, French, German, and more, demonstrating strong multilingual capability. This feature enables it to meet the diverse needs of global users.
Real-time Voice Generation
The Fish Audio S1 API has a first-frame latency of less than 500 milliseconds, with playback starting in less than half a second for a single sentence. Simultaneously, it supports streaming input and output, enabling natural interaction where text is received and instantly read aloud.
3、Fish Audio S1’ Pricing
Fish Audio S1 adopts a flexible three-tier pricing structure, catering to diverse needs from individual users to enterprise clients. This pricing framework is meticulously designed to ensure optimal cost-effectiveness while guaranteeing technological sophistication.
Free Trial Plan
The Free Plan offers a monthly allowance of 8,000 credits, supporting users to generate up to 7 minutes of S1 high-quality audio. This plan is suitable for users new to AI voice technology to experience the product’s core functionalities, with a text generation limit of 500 characters per segment and using standard generation speed. The free plan resets on a fixed date each month, providing ample opportunity for users to experience the technical advantages of Fish Audio S1.
Plus Creator Plan
Targeting content creators and freelancers, the Plus Plan is priced at $11 per month (annual average), providing a monthly allowance of 250,000 credits. This tier supports up to 200 minutes of S1 generation and 400 minutes of v1.5/v1.6 generation, with the text limit extended to 15,000 characters per segment. In addition to enhanced voice cloning features, it includes commercial usage rights and pay-as-you-go API access, offering a complete commercial solution for professional creators.
Pro Professional Plan
Aimed at enterprises and advanced users, the Pro Plan is priced at $75 per month (annual average), offering a generous allowance of 2,000,000 credits. Users get 27 hours of S1 generation and 54 hours of v1.5/v1.6 generation capability per month, with a single generation character limit of 30,000 characters. This plan includes all premium features, such as enhanced voice cloning, commercial licensing, and API access, sufficient to meet the voice generation needs of large-scale commercial projects.
Compared to equivalent products in the industry, Fish Audio S1’s pricing demonstrates a clear competitive advantage. Independent analysis shows that the cost of its voice cloning service is about one-sixth of its main competitors, while maintaining industry-leading audio quality. For budget-sensitive users, the free plan offers a substantial trial opportunity; for commercial users, the tiered pricing ensures the best balance between cost controllability and feature completeness.
4、How To Use Fish Audio S1?
Basic Usage Process
For ordinary users, Fish Audio provides an intuitive web interface. Users simply need to visit the official website, register an account, and then input the content they want to convert into the text box, add emotional markings as needed, select the voice timbre and language settings, and finally click generate to obtain high-quality voice output.
Advanced Feature Usage
For users who wish to implement voice cloning, the operation is equally straightforward. Simply prepare a clear target voice sample (about 10-30 seconds), upload it to the platform, and the system will complete the voice modeling in a short time, generating a high-quality cloned voice.
API Integration
For developers, Fish Audio S1 provides a comprehensive API interface. With a first-frame latency of less than 500 milliseconds and support for streaming, it can be integrated into various applications to achieve real-time voice interaction functionality. Developers can integrate high-quality Text-to-Speech and voice cloning features into their applications through simple REST endpoints.
5、Who Can Benefit From Fish Audio S1?
Content Creators
For YouTube video producers, podcasters, and social media content creators, Fish Audio S1 can quickly convert manuscripts into high-quality voice-overs, significantly boosting content production efficiency. Its rich emotional control feature can also help creators add more appropriate emotional expression to their content, enhancing the audience experience.
Gaming and Entertainment Industry
Game development companies can utilize Fish Audio S1 to generate realistic dialogue and narration for different characters, enhancing player immersion. Its multilingual support feature also makes it easy to localize game voice-overs, reducing costs for international distribution.
Enterprise Customer Service
Fish Audio S1 can provide more natural and emotionally rich voice responses for customer service systems, improving user experience. Its low-latency feature ensures natural and smooth interaction, supporting the creation of more human-like virtual assistants.
Education Sector
Educational institutions and online learning platforms can use this technology to generate multilingual learning content, helping students better understand and learn the pronunciation and intonation of different languages. Its high-accuracy pronunciation also provides quality learning resources for language learners.
Developer Community
The Fish Audio team has open-sourced its S1-mini model, providing a free, high-quality voice synthesis tool for the research and education fields. Developers can base their secondary development on this model, driving further innovation in voice technology.
The launch of Fish Audio S1 marks a significant transition in AI voice technology from “usable” to “perceivable.” Its high-fidelity, low-latency features are accelerating the widespread adoption of AI voice in virtual humans, smart assistants, content creation, and voice-over sectors.
With continuous technological iteration, Fish Audio is expected to further solidify its leading position in the AI voice domain, offering a smarter and more natural voice interaction experience to global users.
