TTS-PRISM-7B

A Perceptual Reasoning and Interpretable Speech Model for Fine-Grained Diagnosis

⭐ If TTS-PRISM is helpful to your research, please help star our GitHub repo. Thanks! 🤗

📖 Introduction

While generative text-to-speech (TTS) models approach human-level quality, monolithic metrics (like MOS) fail to diagnose fine-grained acoustic artifacts or explain perceptual collapse. To address this, we propose TTS-PRISM, a multi-dimensional diagnostic framework for Mandarin.

Powered by the MiMo-Audio backbone and fine-tuned on a targeted 200k-sample diagnostic dataset, TTS-PRISM embeds explicit scoring criteria and reasoning into an efficient end-to-end model. It not only predicts scores but also generates rationales explaining the specific acoustic flaws or expressive highlights.

🎯 The 12-Dimensional Evaluation Schema

Unlike generalist models, TTS-PRISM evaluates speech across a strictly defined 12-dimensional hierarchical taxonomy:

Layer	Dimension	Description
Basic Capability (Score 1-5)	🎧 Audio Clarity	Detects background noise, electronic distortion, or artifacts.
	🗣️ Pronunciation	Identifies incomplete articulation, tone sandhi errors, etc.
	🎵 Prosody (3)	Evaluates Intonation, Pauses, and Speech Rate.
	🔄 Consistency (3)	Monitors Speaker, Style, and Emotion consistency.
Advanced Expressiveness (Score 0-2 Bonus)	💥 Stress	Evaluates keyword emphasis via pitch or loudness.
	〰️ Lengthening	Checks for natural syllabic lengthening at phrase boundaries.
	🎭 Paralinguistics	Detects non-verbal cues (laughter, sighs, breaths).
	💖 Emotion	Evaluates the fullness and intensity of the expressed sentiment.

🏗 Architecture Overview

Overall architecture of the TTS-PRISM framework.

📥 Model Download & Usage

This repository contains the model weights for TTS-PRISM-7B.

You can download the model weights using the huggingface-cli:

pip install huggingface-hub

# Download the Tokenizer
hf download XiaomiMiMo/MiMo-Audio-Tokenizer --local-dir ./models/MiMo-Audio-Tokenizer

# Download the TTS-PRISM-7B weights
hf download xiaomi-research/TTS-PRISM-7B --local-dir ./models/TTS-PRISM-7B

🚀 Running Inference

For the complete inference pipeline, data preparation, and 12-dimensional diagnostic scripts, please visit our official GitHub repository: 👉 xiaomi-research/tts-prism

✒️ Citation

If you find our work helpful, please cite our paper:

@inproceedings{wang2026ttsprism,
  title={TTS-PRISM: A Perceptual Reasoning and Interpretable Speech Model for Fine-Grained Diagnosis},
  author={Wang, Xi and others},
  booktitle={Interspeech},
  year={2026}
}

⚖️ License

This project is licensed under the Apache License 2.0. Copyright (c) 2026 Xiaomi Corporation.