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librittsr_1069_133699_000036_000000 | "What did you say about me?" Isabel asked. | quoted | [
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librittsr_1098_133695_000052_000001 | You're too fond of your own ways." | quoted | [
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librittsr_1183_133255_000011_000000 | "BULLY SHINE." A waterproof paste polish for all kinds of black shoes and old rubbers. | quoted | [
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167528... | THE SAD STORY OF MY FATHER'S GREAT SUFFERING FROM CANCER | 1183_133255_000058_000000 | {
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librittsr_125_121342_000014_000000 | Answer.--That I have about twenty-four dollars to my name. | general | [
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VyvoTTS EN-Beta — 2,000 automatic DPO pairs
Exactly 2,000 unique target texts and chosen/rejected pairs, generated by
Vyvo/VyvoTTS-EN-Beta at revision 70b37a5bfdbdc2f478515837081048aac63f909e. Each row embeds the actual 24 kHz reference,
chosen and rejected audio, raw prompt and completion codec IDs, transcripts,
WER/CER, DNSMOS P.835, sampling settings, seeds and waveform SHA-256 checksums.
Both candidate waveforms are actual model outputs; no artificial corruption.
Reference-audio continuation conditioning matches the working EN-Beta inference
interface. Candidates use temperatures 0.6, 1.0 and 1.2, top-p 0.95, top-k 20,
repetition penalty 1.1. Preferred status is determined by metrics, never by temperature.
Maximum prompt-plus-completion length is 2100 tokens; no audio tokens are truncated.
The sampler is qwen3-compact-codebook-v1: valid-codebook projection with finished
rows removed from the batch. Its RNG sequence differs from dense generation;
backend and per-candidate batch size are retained in generation metadata.
Selection and limitations
Whisper-large-v3 FP32 transcribes every valid candidate. Selection uses Whisper
English normalization after Unicode NFKC and curly-apostrophe canonicalization
(whisper-english-unicode-v1). Original seed-style and original Whisper-normalized WER/CER are
also retained. Chosen WER must be <=0.10 and DNSMOS OVRL >=3.0. A pair must improve
WER by >=0.05 with DNSMOS loss <=0.05, or improve DNSMOS by >=0.1 without WER loss.
Ties, invalid codec output and overlength completions are not preference pairs.
Labels are automatic, not human-reviewed. DNSMOS is an estimate, and ASR can make
errors. Speaker similarity is not a selection metric. This dataset alone does
not establish post-training improvements; evaluate trained checkpoints separately.
The train split contains all 2,000 rows. Select a separate validation set
before training; do not use seed-tts-eval for training or checkpoint selection.
Source and attribution
Text and reference recordings come only from the train-clean-100 split of LibriTTS-R (CC BY 4.0), by Yuma Koizumi et al., “LibriTTS-R: A Restored Multi-Speaker Text-to-Speech Corpus” (2023), derived from LibriTTS and LibriSpeech/LibriVox. Target speech was newly synthesized by EN-Beta; source IDs, speaker IDs and reference IDs are retained. Exact text matches and eight-word overlaps with seed-tts-eval English reference/target texts are excluded. No benchmark waveform is used as a training reference.
The source checkpoint has no declared license in its model card. This dataset
does not assign a new license to the checkpoint or override source rights.
See source_manifest.json, mining_report.json and validation.json for provenance
and counts. This replaces the earlier 15-row demonstration in the same repo.
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