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+# 🐟 Fish Speech S2 Pro — Quantization Experiments
+
+Multi-phase quantization of Fish Audio S2 Pro (4.56B params) on A100-SXM4-80GB.
+
+## Results Summary
+
+| Phase | Method | Target | Disk Size (MB) | Compression |
+|-------|--------|--------|----------------|-------------|
+| 1a | FP8 (per-row) | Slow AR | 5240 | 4.91x |
+| 1b | INT4 (group=128) | Slow AR | 5344 | 4.91x |
+| 2a | INT4 (group=128) | All layers | 4962 | 8.87x |
+| 2b | INT8 (per-row) | Slow AR | 5240 | 4.91x |
+| 2c | INT3 (group=128) | Slow AR | 5344 | 4.91x |
+| 3a | INT2 (group=64) | Slow AR | 5453 | 4.91x |
+| 3b | INT2 (group=64) | All layers | 5082 | 8.87x |
+
+**Note:** Disk sizes with safetensors format show similar sizes because int8/int4/int3/int2 
+values are stored in int8 dtype tensors (safetensors doesn't support sub-byte packing). 
+Actual memory usage during inference will differ significantly.
+
+## Baseline: BF16 (Original)
+- **fishaudio/s2-pro**: ~10.8 GB total (model + codec)
+- **drbaph/s2-pro-fp8**: ~6.2 GB (FP8 proven, zero quality loss)
+
+## Architecture
+- **Slow AR**: 36 layers, dim 2560, 32 heads (GQA), ~4.0B params
+- **Fast AR**: 4 layers, dim 2560, 32 heads (GQA), ~0.4B params  
+- **Codec**: DAC RVQ, 10 codebooks, 44.1kHz
+
+## Citation
+```bibtex
+@misc{liao2026fishaudios2technical,
+      title={Fish Audio S2 Technical Report},
+      author={Shijia Liao and Yuxuan Wang and others},
+      year={2026}, eprint={2603.08823},
+      archivePrefix={arXiv}, primaryClass={cs.SD},
+}
+```