Fish Audio S2 Pro TTS

Dual-AR architecture (Slow AR 4B + Fast AR 400M), 10 RVQ codebooks, ~21 Hz frame rate, 80+ languages.

• Model: fishaudio/s2-pro
• Output: 44.1 kHz WAV/PCM mono
• VRAM: ≥24GB for inference, A800/H200 recommended
• Technical Report: arXiv 2603.08823 | Architecture

Installation

See references/install.md. Quick summary:

conda create -n fish-speech python=3.12 && conda activate fish-speech
pip install -e .[cu129]     # CUDA 12.9
# or: uv sync --python 3.12 --extra cu129
# minimal: pip install fish-speech