Common Voice Scripted Speech 26.0 - South Asian English (India, Pakistan, Sri Lanka)

Splits and speakers: 112,099 validated clips total — train 101,702 clips / 2,270 speakers, dev 6,533 clips / 102 speakers, test 3,864 clips / 81 speakers. Split is speaker-disjoint (no client_id appears in more than one split), proportioned 90.73/5.83/3.45 by clip count via a greedy per-speaker balancing algorithm targeting 95/2.5/2.5. The deviation from target is larger than in sibling subsets because per-speaker clip counts are extremely skewed here (max single speaker: 5,019 clips, ~4.5% of the whole subset; mean 45.7 clips/speaker, median 7), so the greedy assignment cannot track the target ratio as closely while keeping every speaker's clips within one split.

Clip duration: 166.00 hours total (597,605 seconds) across 112,099 clips. Per-split: train 149.95h, dev 10.12h, test 5.94h. Per-clip: mean 5.33s, median 5.23s, min 0.82s, max 27.79s, std 1.80s.

Gender distribution: male_masculine 67,235; female_feminine 38,917; blank/unspecified 5,947.

Age distribution (shipped subset, self-declared): twenties 73,613; thirties 12,323; fourties 10,458; blank/unspecified 5,854; teens 5,488; fifties 3,994; sixties 369.

Closed-form accent matching (QA): the accents field is pipe-delimited multi-select in the source corpus, but this subset was deliberately filtered to the closed-form (exact-match) rule — 100% of shipped clips have accents == exactly "India and South Asia (India, Pakistan, Sri Lanka)", no co-occurring tags.

Open-form vs. closed-form comparison (at execution time): open-form (accents contains "India and South Asia (India, Pakistan, Sri Lanka)") = 113,634 clips / 2,528 speakers / 168.46h; closed-form (accents == exactly that string) = 112,099 clips / 2,453 speakers / 166.00h. Closed-form drops 1,535 clips (1.35%).

Full-corpus accent x gender and age x gender cross-tabs are in stats.md.

Derivation methodology: derived from the Mozilla Common Voice Scripted Speech 26.0 English release (cv-corpus-26.0-2026-06-12, locale en). Filter: validated rows only (present in the source validated.tsv), whose self-declared accents field is exactly "India and South Asia (India, Pakistan, Sri Lanka)" (closed-form/exact match). No gender or age filter applied. Speaker-disjoint train/dev/test split via a greedy per-speaker assignment balancing toward 95/2.5/2.5 targets. Only the referenced MP3 clips were extracted from the ~2.58M-clip, ~89GB source archive (not the full archive) via a single sequential streaming pass over the source tar.gz.