Commit ·
002bebf
0
Parent(s):
Junco v0.1
Browse files- .gitattributes +39 -0
- LICENSE +202 -0
- NOTICE +16 -0
- README.md +238 -0
- config.json +14 -0
- onnx/LICENSE-vocos +21 -0
- onnx/decoder-int8.onnx +3 -0
- onnx/encoder.onnx +3 -0
- onnx/junco.json +21 -0
- onnx/vocoder.onnx +3 -0
- samples/assistant.wav +3 -0
- samples/greeting.wav +3 -0
- samples/news.wav +3 -0
- samples/story.wav +3 -0
.gitattributes
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LICENSE
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Unless required by applicable law or agreed to in writing, software
|
| 199 |
+
distributed under the License is distributed on an "AS IS" BASIS,
|
| 200 |
+
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
| 201 |
+
See the License for the specific language governing permissions and
|
| 202 |
+
limitations under the License.
|
NOTICE
ADDED
|
@@ -0,0 +1,16 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
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|
|
|
|
|
|
|
| 1 |
+
Junco v0.1 (flockspeech/junco)
|
| 2 |
+
Copyright 2026 Flock Speech
|
| 3 |
+
|
| 4 |
+
Licensed under the Apache License, Version 2.0 (see LICENSE). This covers the Junco acoustic model weights
|
| 5 |
+
(onnx/encoder.onnx, onnx/decoder-int8.onnx) and the model configuration (onnx/junco.json).
|
| 6 |
+
|
| 7 |
+
Third-party components:
|
| 8 |
+
|
| 9 |
+
- Vocos vocoder (onnx/vocoder.onnx): converted from charactr/vocos-mel-24khz,
|
| 10 |
+
Copyright (c) 2023 Charactr Inc., MIT License (see onnx/LICENSE-vocos).
|
| 11 |
+
- Training data: LJ Speech Dataset (Keith Ito and Linda Johnson), public domain.
|
| 12 |
+
|
| 13 |
+
Not included, required at run time to turn text into phonemes:
|
| 14 |
+
|
| 15 |
+
- espeak-ng (GPL-3.0) and phonemizer (GPL-3.0). The flockspeech pip package installs them as separate
|
| 16 |
+
dependencies.
|
README.md
ADDED
|
@@ -0,0 +1,238 @@
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|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
---
|
| 2 |
+
license: apache-2.0
|
| 3 |
+
language:
|
| 4 |
+
- en
|
| 5 |
+
library_name: onnx
|
| 6 |
+
pipeline_tag: text-to-speech
|
| 7 |
+
tags:
|
| 8 |
+
- text-to-speech
|
| 9 |
+
- tts
|
| 10 |
+
- speech-synthesis
|
| 11 |
+
- neural-tts
|
| 12 |
+
- offline-tts
|
| 13 |
+
- on-device
|
| 14 |
+
- edge-ai
|
| 15 |
+
- edge
|
| 16 |
+
- offline
|
| 17 |
+
- cpu
|
| 18 |
+
- onnx
|
| 19 |
+
- onnxruntime
|
| 20 |
+
- lightweight
|
| 21 |
+
- small-model
|
| 22 |
+
- vocos
|
| 23 |
+
- english
|
| 24 |
+
- raspberry-pi
|
| 25 |
+
- flockspeech
|
| 26 |
+
- accessibility
|
| 27 |
+
- screen-reader
|
| 28 |
+
- voice-assistant
|
| 29 |
+
- narration
|
| 30 |
+
datasets:
|
| 31 |
+
- keithito/lj_speech
|
| 32 |
+
---
|
| 33 |
+
|
| 34 |
+
# Junco v0.1: tiny offline text-to-speech (TTS) for CPU
|
| 35 |
+
|
| 36 |
+
**A small, natural English text-to-speech model that runs offline on any CPU. 44 MB, no GPU, no cloud.**
|
| 37 |
+
|
| 38 |
+
Junco is an 11.4M-parameter text-to-speech model from [Flock Speech](https://huggingface.co/flockspeech). It turns
|
| 39 |
+
English text into natural 24 kHz speech on an ordinary CPU, faster than real time. It has no GPU, network or PyTorch
|
| 40 |
+
dependency, and the full model is a 44 MB download.
|
| 41 |
+
|
| 42 |
+
Junco is the clear, neutral **reading voice** of the Flock Speech family: a good fit for voice assistants, screen
|
| 43 |
+
readers, notifications, narration and other on-device or edge AI speech output. Install it with
|
| 44 |
+
`pip install flockspeech`.
|
| 45 |
+
|
| 46 |
+
| Flock Speech voices | Style | Model card |
|
| 47 |
+
|---|---|---|
|
| 48 |
+
| **Junco** | clear, neutral reading voice | this page |
|
| 49 |
+
| **Goldfinch** | conversational voice that laughs and breathes on cue with `[laugh]` tags | [flockspeech/goldfinch](https://huggingface.co/flockspeech/goldfinch) |
|
| 50 |
+
|
| 51 |
+
| | |
|
| 52 |
+
|---|---|
|
| 53 |
+
| **Developed by** | Flock Speech |
|
| 54 |
+
| **Model type** | Neural text-to-speech: compact acoustic model + Vocos vocoder |
|
| 55 |
+
| **Language** | English (US) |
|
| 56 |
+
| **Voices** | 1 (female, read-aloud style) |
|
| 57 |
+
| **Output** | 24 kHz mono audio |
|
| 58 |
+
| **Parameters** | 11.4M acoustic model + 13.5M vocoder |
|
| 59 |
+
| **Download** | 44 MB (ONNX; int8 decoder, fp16 encoder and vocoder) |
|
| 60 |
+
| **Runtime** | ONNX Runtime on CPU (Linux, macOS, Windows; x86-64 and ARM64) |
|
| 61 |
+
| **License** | Apache-2.0 (vocoder weights MIT) |
|
| 62 |
+
| **Version** | v0.1, November 2026 |
|
| 63 |
+
|
| 64 |
+
## Samples
|
| 65 |
+
|
| 66 |
+
All samples were made with the files in this repository at default settings (8 steps, seed 0), with no editing.
|
| 67 |
+
|
| 68 |
+
| Use | Text | Audio |
|
| 69 |
+
|---|---|---|
|
| 70 |
+
| Greeting | *Hello! I'm Junco, a tiny voice that runs entirely on your own device.* | <audio controls src="https://huggingface.co/flockspeech/junco/resolve/main/samples/greeting.wav"></audio> |
|
| 71 |
+
| Assistant | *Your next meeting starts in fifteen minutes. Would you like me to read the agenda?* | <audio controls src="https://huggingface.co/flockspeech/junco/resolve/main/samples/assistant.wav"></audio> |
|
| 72 |
+
| Narration | *The old lighthouse keeper climbed the spiral stairs one last time, and watched the ships come home through the fog.* | <audio controls src="https://huggingface.co/flockspeech/junco/resolve/main/samples/story.wav"></audio> |
|
| 73 |
+
| News | *Researchers announced on Tuesday that the new battery can be charged in under ten minutes, and lasts twice as long.* | <audio controls src="https://huggingface.co/flockspeech/junco/resolve/main/samples/news.wav"></audio> |
|
| 74 |
+
|
| 75 |
+
## Quick start
|
| 76 |
+
|
| 77 |
+
The [`flockspeech`](https://pypi.org/project/flockspeech/) Python package bundles these weights, so nothing is downloaded
|
| 78 |
+
at run time.
|
| 79 |
+
|
| 80 |
+
```sh
|
| 81 |
+
pip install flockspeech
|
| 82 |
+
flockspeech "Hello! I'm Junco." -o hello.wav --play
|
| 83 |
+
```
|
| 84 |
+
|
| 85 |
+
```python
|
| 86 |
+
from flockspeech import Junco
|
| 87 |
+
|
| 88 |
+
tts = Junco() # loads in under a second
|
| 89 |
+
audio = tts("Hello there.") # float32 numpy array, 24 kHz mono
|
| 90 |
+
tts.save("Hello there.", "hello.wav")
|
| 91 |
+
|
| 92 |
+
# Low latency: audio is produced sentence by sentence
|
| 93 |
+
for chunk in tts.stream(long_text):
|
| 94 |
+
play(chunk)
|
| 95 |
+
```
|
| 96 |
+
|
| 97 |
+
To use the files in this repository directly:
|
| 98 |
+
|
| 99 |
+
```python
|
| 100 |
+
from huggingface_hub import snapshot_download
|
| 101 |
+
from flockspeech import Junco
|
| 102 |
+
|
| 103 |
+
path = snapshot_download("flockspeech/junco", allow_patterns=["onnx/*"])
|
| 104 |
+
tts = Junco(model_dir=f"{path}/onnx")
|
| 105 |
+
```
|
| 106 |
+
|
| 107 |
+
### Options
|
| 108 |
+
|
| 109 |
+
| Parameter | Default | Effect |
|
| 110 |
+
|---|---|---|
|
| 111 |
+
| `speed` | 1.0 | Speaking rate; 1.2 is 20% faster |
|
| 112 |
+
| `steps` | 8 | Generation steps; 4 is about 1.5× faster with slightly lower quality |
|
| 113 |
+
| `seed` | 0 | Fixes the small random variation in delivery, so output is reproducible |
|
| 114 |
+
| `threads` | up to 4 | CPU threads for ONNX Runtime |
|
| 115 |
+
|
| 116 |
+
## Intended use
|
| 117 |
+
|
| 118 |
+
**Suitable for:**
|
| 119 |
+
- Voice output on devices and in apps that must work offline or keep text private: assistants, accessibility and
|
| 120 |
+
screen-reading tools, kiosks, robotics, games and embedded products.
|
| 121 |
+
- CPU-only servers where cost or latency matters.
|
| 122 |
+
- Prototyping and research on small TTS models.
|
| 123 |
+
|
| 124 |
+
**Out of scope:**
|
| 125 |
+
- Languages other than English, or speaker voices other than the one provided. Junco has no voice cloning.
|
| 126 |
+
- Expressive, emotional or conversational styles. The voice reads in a neutral, read-aloud style.
|
| 127 |
+
- Impersonating a real person, or producing audio meant to deceive listeners about who is speaking or whether the
|
| 128 |
+
speech is synthetic.
|
| 129 |
+
|
| 130 |
+
## Limitations
|
| 131 |
+
|
| 132 |
+
- **No text normalisation.** Write numbers, currency, dates and abbreviations in words: "five dollars", not "$5";
|
| 133 |
+
"Doctor", not "Dr.". Raw digits and symbols are read by espeak-ng's rules, which may not be what you want.
|
| 134 |
+
- **Pronunciation comes from espeak-ng.** Rare names, brands and some homographs, such as *read* and *lead*, can be
|
| 135 |
+
mispronounced.
|
| 136 |
+
- **One voice, one accent.** The model learned from a single US English speaker.
|
| 137 |
+
- **Long-form audio.** Text is synthesised sentence by sentence. Prosody does not carry across sentences.
|
| 138 |
+
- **Bright high frequencies.** About 14% of Junco's energy lies above 4 kHz, against 2% for real recordings. On some
|
| 139 |
+
playback systems this may sound slightly bright or hissy.
|
| 140 |
+
|
| 141 |
+
## Risks and responsible use
|
| 142 |
+
|
| 143 |
+
Synthetic speech can be misused for deception. Junco produces a single fixed voice and cannot clone speakers, which
|
| 144 |
+
limits impersonation risk. We still ask that you:
|
| 145 |
+
- tell listeners when speech is synthetic, where that matters;
|
| 146 |
+
- not use the model for fraud, harassment or deceptive impersonation;
|
| 147 |
+
- review output before you use it in safety-critical or high-stakes settings.
|
| 148 |
+
|
| 149 |
+
## Model details
|
| 150 |
+
|
| 151 |
+
### How it works
|
| 152 |
+
|
| 153 |
+
Text is converted to phonemes with espeak-ng, a compact neural acoustic model turns the phonemes into a mel
|
| 154 |
+
spectrogram, and the [Vocos](https://huggingface.co/charactr/vocos-mel-24khz) vocoder (MIT) turns that into 24 kHz
|
| 155 |
+
audio. All three run in ONNX Runtime on the CPU.
|
| 156 |
+
|
| 157 |
+
### Files
|
| 158 |
+
|
| 159 |
+
| File | Contents | Size |
|
| 160 |
+
|---|---|---:|
|
| 161 |
+
| `onnx/encoder.onnx` | Acoustic model, part 1 (fp16 weights) | 7.2 MB |
|
| 162 |
+
| `onnx/decoder-int8.onnx` | Acoustic model, part 2 (int8) | 9.9 MB |
|
| 163 |
+
| `onnx/vocoder.onnx` | Vocos vocoder (fp16 weights) | 27.1 MB |
|
| 164 |
+
| `onnx/junco.json` | Mel normalisation statistics and default inference settings | <1 kB |
|
| 165 |
+
| `samples/` | The audio samples above | |
|
| 166 |
+
|
| 167 |
+
### Training
|
| 168 |
+
|
| 169 |
+
| | |
|
| 170 |
+
|---|---|
|
| 171 |
+
| **Data** | [LJ Speech](https://keithito.com/LJ-Speech-Dataset/): 13,100 clips, about 24 hours, one speaker, public domain |
|
| 172 |
+
| **Compute** | 3 hours on one NVIDIA T4 GPU, from scratch |
|
| 173 |
+
|
| 174 |
+
**Environmental impact.** The final training run used about 3 GPU-hours on one NVIDIA T4 (70 W TDP), or about
|
| 175 |
+
0.2 kWh. Architecture experiments before it used more.
|
| 176 |
+
|
| 177 |
+
## FAQ
|
| 178 |
+
|
| 179 |
+
**Does Junco need a GPU or an internet connection?**
|
| 180 |
+
No. It runs on an ordinary CPU with ONNX Runtime. Once installed, speech is generated fully offline and your text
|
| 181 |
+
never leaves the machine.
|
| 182 |
+
|
| 183 |
+
**How big is it?**
|
| 184 |
+
44.2 MB in total: a 17.1 MB acoustic model plus the 27.1 MB Vocos vocoder. Junco and Goldfinch share the vocoder, so
|
| 185 |
+
both voices together take 61.3 MB.
|
| 186 |
+
|
| 187 |
+
**Can it run on a Raspberry Pi or other ARM boards?**
|
| 188 |
+
It runs on 64-bit ARM Linux wherever `onnxruntime` and `espeakng-loader` publish wheels, including 64-bit Raspberry
|
| 189 |
+
Pi OS.
|
| 190 |
+
|
| 191 |
+
**Can I stream audio for low latency?**
|
| 192 |
+
Yes. `tts.stream(text)` yields audio sentence by sentence, so playback can start before the whole text is done.
|
| 193 |
+
|
| 194 |
+
**Can I use it without Python?**
|
| 195 |
+
The ONNX files run in any ONNX Runtime binding. The text front end (espeak-ng phonemes) and the small loop around the
|
| 196 |
+
three models live in the [`flockspeech`](https://github.com/flockspeech/flockspeech) package, which you can port.
|
| 197 |
+
|
| 198 |
+
**Does it support voice cloning or other languages?**
|
| 199 |
+
No. Junco is one English (US) voice. For a casual, conversational voice, use
|
| 200 |
+
[Goldfinch](https://huggingface.co/flockspeech/goldfinch).
|
| 201 |
+
|
| 202 |
+
**Can I use it commercially?**
|
| 203 |
+
Yes. The weights are Apache-2.0 and the vocoder is MIT. The phonemiser (espeak-ng, phonemizer) is GPL-3.0 and is
|
| 204 |
+
installed separately; see the License section below.
|
| 205 |
+
|
| 206 |
+
## License
|
| 207 |
+
|
| 208 |
+
- **Junco weights and configuration:** [Apache License 2.0](LICENSE). Commercial use, modification and redistribution
|
| 209 |
+
are allowed.
|
| 210 |
+
- **Vocos vocoder weights** (`onnx/vocoder.onnx`): MIT, © 2023 Charactr Inc. See `onnx/LICENSE-vocos`.
|
| 211 |
+
- **Training data:** LJ Speech, public domain.
|
| 212 |
+
|
| 213 |
+
**Run-time dependency.** Text-to-phoneme conversion uses espeak-ng and phonemizer. Both are GPL-3.0 and are **not**
|
| 214 |
+
included in this repository. The `flockspeech` package installs them as separate dependencies. If you plan to ship
|
| 215 |
+
Junco inside a closed-source product, review their licence terms, or replace the phonemiser with one under a licence
|
| 216 |
+
that suits you. See [NOTICE](NOTICE).
|
| 217 |
+
|
| 218 |
+
## Citation
|
| 219 |
+
|
| 220 |
+
```bibtex
|
| 221 |
+
@misc{flockspeech2026junco,
|
| 222 |
+
title = {Junco: a small text-to-speech model for on-device use},
|
| 223 |
+
author = {{Flock Speech}},
|
| 224 |
+
year = {2026},
|
| 225 |
+
howpublished = {\url{https://huggingface.co/flockspeech/junco}},
|
| 226 |
+
note = {Version 0.1}
|
| 227 |
+
}
|
| 228 |
+
```
|
| 229 |
+
|
| 230 |
+
## Links
|
| 231 |
+
|
| 232 |
+
- Python package: [pypi.org/project/flockspeech](https://pypi.org/project/flockspeech/)
|
| 233 |
+
- Source code: [github.com/flockspeech/flockspeech](https://github.com/flockspeech/flockspeech)
|
| 234 |
+
- Conversational voice: [flockspeech/goldfinch](https://huggingface.co/flockspeech/goldfinch)
|
| 235 |
+
|
| 236 |
+
## Acknowledgements
|
| 237 |
+
|
| 238 |
+
We thank the authors of LJ Speech and of the Vocos vocoder.
|
config.json
ADDED
|
@@ -0,0 +1,14 @@
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|
| 1 |
+
{
|
| 2 |
+
"name": "Junco",
|
| 3 |
+
"family": "Flock Speech",
|
| 4 |
+
"version": "v0.1",
|
| 5 |
+
"style": "clear reading voice",
|
| 6 |
+
"language": "en-US",
|
| 7 |
+
"sample_rate": 24000,
|
| 8 |
+
"runtime": "onnxruntime",
|
| 9 |
+
"package": "flockspeech",
|
| 10 |
+
"install": "pip install flockspeech",
|
| 11 |
+
"files": {
|
| 12 |
+
"onnx": "onnx/junco.json"
|
| 13 |
+
}
|
| 14 |
+
}
|
onnx/LICENSE-vocos
ADDED
|
@@ -0,0 +1,21 @@
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|
| 1 |
+
MIT License
|
| 2 |
+
|
| 3 |
+
Copyright (c) 2023 Charactr Inc.
|
| 4 |
+
|
| 5 |
+
Permission is hereby granted, free of charge, to any person obtaining a copy
|
| 6 |
+
of this software and associated documentation files (the "Software"), to deal
|
| 7 |
+
in the Software without restriction, including without limitation the rights
|
| 8 |
+
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
| 9 |
+
copies of the Software, and to permit persons to whom the Software is
|
| 10 |
+
furnished to do so, subject to the following conditions:
|
| 11 |
+
|
| 12 |
+
The above copyright notice and this permission notice shall be included in all
|
| 13 |
+
copies or substantial portions of the Software.
|
| 14 |
+
|
| 15 |
+
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
| 16 |
+
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
| 17 |
+
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
| 18 |
+
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
| 19 |
+
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
| 20 |
+
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
| 21 |
+
SOFTWARE.
|
onnx/decoder-int8.onnx
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
|
| 2 |
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|
| 3 |
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|
onnx/encoder.onnx
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
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|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
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|
| 3 |
+
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|
onnx/junco.json
ADDED
|
@@ -0,0 +1,21 @@
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|
|
|
|
| 1 |
+
{
|
| 2 |
+
"name": "junco",
|
| 3 |
+
"version": "v0.1",
|
| 4 |
+
"sample_rate": 24000,
|
| 5 |
+
"hop": 256,
|
| 6 |
+
"n_fft": 1024,
|
| 7 |
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"mean": -1.49140640330624,
|
| 8 |
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"std": 2.024339073543612,
|
| 9 |
+
"defaults": {
|
| 10 |
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"n_steps": 8,
|
| 11 |
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"g": 1.0,
|
| 12 |
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"z": 0.667,
|
| 13 |
+
"s": -1.0
|
| 14 |
+
},
|
| 15 |
+
"files": {
|
| 16 |
+
"encoder": "encoder.onnx",
|
| 17 |
+
"decoder": "decoder-int8.onnx",
|
| 18 |
+
"vocoder": "../vocoder.onnx"
|
| 19 |
+
},
|
| 20 |
+
"tags": {}
|
| 21 |
+
}
|
onnx/vocoder.onnx
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
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|
|
|
|
| 1 |
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version https://git-lfs.github.com/spec/v1
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|
| 3 |
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size 27075761
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samples/assistant.wav
ADDED
|
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version https://git-lfs.github.com/spec/v1
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samples/greeting.wav
ADDED
|
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version https://git-lfs.github.com/spec/v1
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ADDED
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version https://git-lfs.github.com/spec/v1
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version https://git-lfs.github.com/spec/v1
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