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README.md
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**Teacher.** All audio was generated with [OmniVoice](https://github.com/k2-fsa/OmniVoice)
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(`k2-fsa/OmniVoice`, commit `c5fdb5cc`, package built from git on 2026-10-15; 32 decoding steps,
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guidance 2.0, fp16)
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(the authors cite training-data constraints such as Emilia) and it bundles Boson's Higgs Audio V2
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tokenizer under the Boson community license. We state this provenance so that downstream users can
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make their own assessment; see "License" below.
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no clipping, then de-duplicated with WavLM x-vectors (cosine < 0.96, calibrated on real speakers) and
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balanced by pitch. Each kept clip is then used as the cloning prompt, so every bank voice is
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consistent across hundreds of sentences. Prompts are published in `voices.jsonl`.
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- `clone_named` (77 h): eight
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**Antton** (14.5 h) are the professional speakers of the
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[HiTZ-Aholab studio corpus](https://zenodo.org/records/17952596) (CC BY 4.0), cloned from a 5–7 s
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studio clip; **Nahia, Ane, Mikel, Jon, Unai, Aitor** (7–8 h each) are synthetic voices chosen by
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listening among 84 voice-design candidates. The named voices were given extra hours on purpose so
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that
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- `clone_real` (126 h): clones of 54 real speakers who recorded for TTS: the 52 volunteers of
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[OpenSLR 76](https://www.openslr.org/76/) (CC BY-SA 4.0) and the two HiTZ-Aholab speakers.
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**No Common Voice contributor was cloned.**
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| `teacher`, `num_step`, `guidance`, `status` | generation parameters; `keep` |
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Extra files: `voices.jsonl` (bank voices and prompts), `splits.json` (split sizes and the held-out
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voice plan), `
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## Known limitations
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**Teacher.** All audio was generated with [OmniVoice](https://github.com/k2-fsa/OmniVoice)
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(`k2-fsa/OmniVoice`, commit `c5fdb5cc`, package built from git on 2026-10-15; 32 decoding steps,
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guidance 2.0, fp16). OmniVoice's code is Apache-2.0; its **weights are CC-BY-NC**
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(the authors cite training-data constraints such as Emilia) and it bundles Boson's Higgs Audio V2
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tokenizer under the Boson community license. We state this provenance so that downstream users can
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make their own assessment; see "License" below.
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no clipping, then de-duplicated with WavLM x-vectors (cosine < 0.96, calibrated on real speakers) and
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balanced by pitch. Each kept clip is then used as the cloning prompt, so every bank voice is
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consistent across hundreds of sentences. Prompts are published in `voices.jsonl`.
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- `clone_named` (77 h): eight named voices with a reserved share. **Maider** (16.4 h) and
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**Antton** (14.5 h) are the professional speakers of the
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[HiTZ-Aholab studio corpus](https://zenodo.org/records/17952596) (CC BY 4.0), cloned from a 5–7 s
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studio clip; **Nahia, Ane, Mikel, Jon, Unai, Aitor** (7–8 h each) are synthetic voices chosen by
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listening among 84 voice-design candidates. The named voices were given extra hours on purpose so
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that models trained on the data reproduce them reliably.
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- `clone_real` (126 h): clones of 54 real speakers who recorded for TTS: the 52 volunteers of
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[OpenSLR 76](https://www.openslr.org/76/) (CC BY-SA 4.0) and the two HiTZ-Aholab speakers.
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**No Common Voice contributor was cloned.**
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| `teacher`, `num_step`, `guidance`, `status` | generation parameters; `keep` |
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Extra files: `voices.jsonl` (bank voices and prompts), `splits.json` (split sizes and the held-out
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voice plan), `manifest-{train,dev,test}-{a,b}.jsonl` (file name, duration, transcript; the data was
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produced in two batches, `a` and `b`, hence two parquet series and two manifests per split).
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## Known limitations
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