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README.md

@@ -1,3 +1,103 @@
----
-license: cc-by-4.0
----
+---
+license: cc-by-4.0
+datasets:
+- amphion/Emilia-Dataset
+- nvidia/hifitts-2
+language:
+- en
+pipeline_tag: text-to-speech
+tags:
+- text-to-speech
+---
+
+# Model Card for VoXtream2
+
+VoXtream2 is a zero-shot full-stream TTS model with dynamic speaking-rate control that can be updated mid-utterance on the fly.
+
+### Key features
+
+- **Dynamic speed control**: Distribution matching and Classifier-free guidance allow for a fine-grained speaking rate control, which can be adjusted as the model generates speech.
+- **Streaming performance**: Works **4x** times faster than real-time and achieves **74 ms** first packet latency in a full-stream on a consumer GPU.
+- **Translingual capability**: Prompt text masking enables support of acoustic prompts in any language.
+
+### Model Sources 
+
+- **Repository:** [repo](https://github.com/herimor/voxtream) 
+- **Paper:** [paper](https://arxiv.org/pdf/2603.13518) 
+- **Demo Page:** [demo page](https://herimor.github.io/voxtream2)
+- **Live Demo:** [live demo](https://huggingface.co/spaces/herimor/voxtream2)
+
+## Get started
+
+### Installation
+
+### eSpeak NG phonemizer
+
+```bash
+# For Debian-like distribution (e.g. Ubuntu, Mint, etc.)
+apt-get install espeak-ng
+# For RedHat-like distribution (e.g. CentOS, Fedora, etc.) 
+yum install espeak-ng
+# For MacOS
+brew install espeak-ng
+```
+
+### Pip package
+
+```bash
+pip install "voxtream>=0.2"
+```
+
+### Usage
+
+* Prompt audio: a file containing 3-10 seconds of the target voice. The maximum supported length is 20 seconds (longer audio will be trimmed).
+* Text: What you want the model to say. The maximum supported length is 1000 characters (longer text will be trimmed).
+* Speaking rate (optional): target speaking rate in syllables per second.
+
+#### Output streaming
+```bash
+voxtream \
+    --prompt-audio assets/audio/english_male.wav \
+    --text "In general, however, some method is then needed to evaluate each approximation." \
+    --output "output_stream.wav"
+```
+
+#### Full streaming (slow speech, 2 syllables per second)
+```bash
+voxtream \
+    --prompt-audio assets/audio/english_female.wav \
+    --text "Staff do not always do enough to prevent violence." \
+    --output "full_stream_2sps.wav" \
+    --full-stream \
+    --spk-rate 2.0
+```
+
+* Note: Initial run may take some time to download model weights and warmup model graph.
+
+### Out-of-Scope Use
+
+Any organization or individual is prohibited from using any technology mentioned in this paper to generate someone's speech without his/her consent, including but not limited to government leaders, political figures, and celebrities. If you do not comply with this item, you could be in violation of copyright laws.
+
+## Training Data
+
+The model was trained on [Emilia](https://huggingface.co/datasets/amphion/Emilia-Dataset) and [HiFiTTS2](https://huggingface.co/datasets/nvidia/hifitts-2) datasets. You can download preprocessed dataset [here](https://huggingface.co/datasets/herimor/voxtream2-train). For more details, please check our paper. 
+
+## Citation 
+
+```
+@inproceedings{torgashov2026voxtream,
+  title={Vo{X}tream: Full-Stream Text-to-Speech with Extremely Low Latency},
+  author={Torgashov, Nikita and Henter, Gustav Eje and Skantze, Gabriel},
+  booktitle={Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)},
+  year={2026},
+  note={to appear},
+  url={https://arxiv.org/abs/2509.15969}
+}
+
+@article{torgashov2026voxtream2,
+  author    = {Torgashov, Nikita and Henter, Gustav Eje and Skantze, Gabriel},
+  title     = {Vo{X}tream2: Full-stream TTS with dynamic speaking rate control},
+  journal   = {arXiv:2603.13518},
+  year      = {2026}
+}
+```

config.json

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+{
+    "phone_former": "phone_former",
+    "temp_former": "temp_former",
+    "dep_former": "dep_former_csm",
+    "phone_vocab_size": 125,
+    "audio_vocab_size": 2050,
+    "audio_pad_size": 0,
+    "embedding_dim": 1024,
+    "spk_embedding_dim": 192,
+    "num_codebooks": 16,
+    "num_phone_states": 6,
+    "amortization_divisor": 16,
+    "max_look_ahead": 5,
+    "audio_window_size": 625,
+    "phone_window_size": 625
+}

dep_former_csm.safetensors

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+size 704938152

model.safetensors

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+oid sha256:b0761a350f9908227dcdce4556328a5896d1bab9d609939869ea941f206febb5
+size 1851507776

phoneme_to_token.json

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+}