Features
Realtime streaming TTS with sub-200ms first-chunk latency
Instant voice cloning from 5–15 seconds audio
Text-based voice design via natural language description
Cross-lingual cloning: one voice speaks 100+ languages natively
Voice steering via bracketed instructions (tone, speed, volume, style)
Multilingual support: 100+ languages (TTS-2), 15 languages (TTS 1.5)
Multiple model tiers: Realtime TTS-2, TTS 1.5 Max, TTS 1.5 Mini
Word-level timestamp alignment
WebSocket support for realtime audio streaming
Unified API for TTS, STT, and LLM routing (220+ models)
Custom pronunciation dictionary
Speaking rate and temperature control
Multiple audio encodings: OGG_OPUS, WAV, PCM, etc.
TTS Playground for testing voices before API integration
Professional voice cloning (add-on for higher tiers)
Text-to-speech with emotion tags (angry, sad, excited, etc.)
Voice cloning from 10–15 seconds of audio
2,000,000+ community voice library
Ultra-low latency TTS API
Real-time streaming voice generation
Speech-to-text with multi-speaker and emotion tags
Fish Audio S2.1 Pro: word-level voice control
AI Voice Design: create a custom voice from text prompt
Professional voice cloning (studio-quality verified clones)
Multilingual voice cloning (any voice in multiple languages)
Voice agent end-to-end solution
Podcast transcription tool
Team Plan with collaboration features
Open-source S2 model on GitHub
