General Audio / Speech ≥10 hrs/speaker (up to 100)

Audiobook & Long-Form Narration — Sustained Expressive

Sustained, expressive long-form narration for audiobook-grade TTS across P0 and P1 languages.

Rights-cleared
Consent documented
🇮🇳 India data residency

View license tiers

Rights-cleared multilingual dataset catalog illustrating the Audiobook & Long-Form Narration — Sustained Expressive dataset

Languages: English, Hindi (P0) + 9 P1 Indic languages
Scale: ≥10 hrs/speaker (up to 100)

Quality & methodology metrics

Measured, audited, reproducible

Audio: WAV (PCM), mono, 48 kHz (min. 44.1 kHz), 24-bit — studio-recorded (professional studio preferred; treated home studio with prior approval).

Transcripts: both verbatim and normalized, with documented handling of numbers, dates, currency, time, URLs, email, abbreviations, symbols and punctuation, and native code-mixing.

Annotation: emotion, paralinguistics, disfluencies and prosody/emphasis applied pre-delivery by native-speaker annotators. Inter-annotator agreement (Cohen's / Fleiss' κ) is reported per annotation type as our QA standard, with a two-pass QA and adjudication workflow.

Deliverables: audio (WAV); transcripts (TXT/CSV/JSONL); annotations (JSON/JSONL/CSV); metadata (JSON/CSV).

Exclusions warranted in writing: no music/singing, no synthetic or TTS-generated audio, no copyrighted material, no ASR-style/web-scraped data.

Provenance & consent

All audio originates from human speakers recorded in vendor-owned, controlled studio sessions under written contributor agreements that grant commercial reuse, including explicit consent for AI training and commercial voice-cloning / synthetic-voice generation. Never scraped, never repurposed from call-centre or telephony recordings.

Methodology

Long-form, expressive, sustained-quality narration with paragraph- and long-form-continuous segmentation and sentence boundaries marked in the transcript. All script content is original, public-domain or fully licensed — no copyrighted books.

Data preview

What's inside each record

A representative schema for Audiobook & Long-Form Narration — Sustained Expressive. The full data card ships the complete field dictionary, value ranges and annotation rubric.

Field	Type	Example
clip_id	string (uuid)	"spk_4421…"
audio_path	string (wav, 16kHz)	"clips/00421.wav"
transcript	string (verbatim)	"We went to the market this morning…"
duration_sec	float	7.42
speaker_meta	object	{age_band, gender, region}
language	string (ISO 639)	"eng"
annotator_id	string (hashed)	"anr_7f3…"
qa_status	enum	"passed"
consent_ref	string	"cns_2024_…"

Representative schema — exact fields and value ranges are documented in the dataset card shipped with every licence.

Licensing

License tiers

Choose the tier that matches your use case. Every tier ships with the full data card, provenance log, and quality report.

Non-Exclusive License

Worldwide, perpetual, transferable, sublicensable license for commercial TTS training, voice cloning and customer-facing API use. Other parties may also license the same set.

Request access

Category-Exclusive License

Exclusive within a defined use-case category (e.g. TTS/voice-cloning) while remaining licensable for other categories. Scoped as an upgrade on the non-exclusive tier.

Talk to sales

Exclusive License

Full single-buyer exclusivity — no other party holds or will receive the data — with worldwide, perpetual, transferable, sublicensable rights and provenance transfer.

Talk to sales

Related datasets

General

General Audio / Speech 🇮🇳 Sovereign

Child-Voice Expressive Speech Set (Major Indian Languages)

Consented child-voice speech in major Indian languages — expressive, read and spontaneous, with code-switching — for age-appropriate ASR, TTS and edtech voice models.

Languages:

Hindi, Tamil, Telugu, Bengali, Marathi, Kannada

Size:

180 hrs · 2,400 child speakers

IAA:

0.86

Licence from

Contact us

Rights-cleared

View data card See pricing
General

General Audio / Speech 🇮🇳 Sovereign

Frontend & Conversational Voice — English + Hindi (Studio)

Natural, warm, neutral studio speech for assistant-style TTS in English and Hindi, including code-mixing — the P0 priority profile.

Languages:

English, Hindi (P0)

Size:

≥10 hrs/speaker (up to 100)

Licence from

Contact us

Rights-cleared

View data card See pricing
General

General Audio / Speech 🇮🇳 Sovereign

Low-Resource Language ASR & TTS Corpus

Paired speech-and-text for low-resource languages, built for both ASR and TTS — read prompts plus spontaneous speech, with studio-grade single-speaker sets for voice building.

Languages:

Santali, Bodo, Dogri, Maithili + Global-South LRLs

Size:

410 hrs · 1,300 speakers · 12 languages

IAA:

0.87

Licence from

Contact us

Rights-cleared

View data card See pricing

See all General datasets

Explore more General data

General datasets Bengali datasets English datasets Gujarati datasets Hindi datasets Kannada datasets Malayalam datasets Marathi datasets Odia datasets Punjabi datasets Tamil datasets Telugu datasets Data services Sovereign delivery

Ready to license Audiobook & Long-Form Narration — Sustained Expressive?

A senior data PM will scope access, residency, and licensing terms and respond within one business day.

Request access Browse the catalog