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Release Date: 9/17/2026
Format: MP3
Size: 380.43 MB
A collection of read speech recordings in Igbo (Ásụ̀sụ́ Ìgbò).
Restrictions/Special Constraints
None provided.
Forbidden Usage
It is forbidden to attempt to determine the identity of speakers in the Common Voice datasets. It is forbidden to re-host or re-share this dataset.
Intended Use
This dataset is intended to be used for training and evaluating automatic speech recognition (ASR) models. It may also be used for applications relating to computer-aided language learning (CALL) and language or heritage revitalisation.
ig)This datasheet is for cv-corpus-27.0-2026-09-11 of the Mozilla Common Voice Scripted Speech dataset for Igbo [Ásụ̀sụ́ Ìgbò - ig]. The dataset contains 12633 clips representing 19.05 hours of recorded speech (2.85 hours validated) from 188 speakers, recorded from a text corpus of 18,393 sentences.
Igbo (Ásụ̀sụ́ Ìgbò) is a Niger-Congo language spoken by over 30 million people, primarily in southeastern Nigeria. It is a tonal language with many dialects. Standard Igbo (Igbo izugbe) serves as the literary form.
Igbo has numerous dialects including Onitsha, Owerri, Ngwa, Afikpo, Nsukka, and others. The Common Voice dataset mainly uses Standard Igbo orthography, but recordings reflect various speaker accents and dialects from Nigeria.
| Code | Accent | Clips | Speakers |
|---|---|---|---|
| - | 1,107 (8.8%) | 11 (5.9%) |
The dataset includes the following self-declared age and gender distributions. A coverage summary is shown below each table.
Self-declared gender information. The table shows clip and speaker counts with percentages. Speakers who did not declare a gender are listed as Unspecified. A dash (-) indicates zero.
| Code | Gender | Clips | Speakers |
|---|---|---|---|
| male_masculine | Male, masculine | 801 (6.3%) | 11 (5.9%) |
| female_feminine | Female, feminine | 7,043 (55.8%) | 53 (28.2%) |
| transgender | Transgender | - | - |
| non-binary | Non-binary | - | - |
| do_not_wish_to_say | Prefer not to say | - | - |
| - | Unspecified | 4,789 (37.9%) | 153 (81.4%) |
Gender declared: 7,844 of 12,633 clips (62.1%), 35 of 188 speakers (18.6%)
Self-declared age information. The table shows clip and speaker counts with percentages. Speakers who did not declare an age are listed as Unspecified. A dash (-) indicates zero.
| Code | Age | Clips | Speakers |
|---|---|---|---|
| teens | Teens | 1,295 (10.3%) | 8 (4.3%) |
| twenties | Twenties | 5,011 (39.7%) | 62 (33.0%) |
| thirties | Thirties | 2,574 (20.4%) | 9 (4.8%) |
| fourties | Fourties | 120 (0.9%) | 2 (1.1%) |
| fifties | Fifties | 5 (0.0%) | 1 (0.5%) |
| sixties | Sixties | 135 (1.1%) | 1 (0.5%) |
| seventies | Seventies | - | - |
| eighties | Eighties | 25 (0.2%) | 1 (0.5%) |
| nineties | Nineties | - | - |
| - | Unspecified | 3,468 (27.5%) | 134 (71.3%) |
Age declared: 9,165 of 12,633 clips (72.5%), 54 of 188 speakers (28.7%)
Clip buckets
| Bucket | Clips |
|---|---|
| Validated | 1,895 (15.0%) |
| Invalidated | 677 (5.4%) |
| Other | 10,061 (79.6%) |
Training splits
| Split | Clips |
|---|---|
| Train | 674 (35.6%) |
| Dev | 593 (31.3%) |
| Test | 618 (32.6%) |
Training split coverage: 1,885 of 1,895 validated clips (99.5%)
The dataset contains 1895 validated, 677 invalidated, and 10061 unresolved clips. The average clip duration is 5.43 seconds.
Validated sentences: 15,392
| Category | Count |
|---|---|
| Unvalidated sentences | 3,001 |
| Pending sentences | 2,991 |
| Rejected sentences | 10 |
| Reported sentences | 47 |
The corpus contains 18,393 sentences: 15,392 validated and 3,001 unvalidated (2,991 pending review, 10 rejected), with 47 reported for review.
Latin script using the Onwu orthography (standard Igbo alphabet). It includes additional letters/digraphs such as: a b ch d e f g gb gh gw h i j k kp kw l m n nw ny ṅ o p r s sh t u v w y z.
a b c ch d e f g gb gh gw h i j k kp kw l m n nw ny ṅ o p r s sh t u v w y z
There follows a randomly selected sample of five sentences from the corpus.
Ya bụ onye òtù ha e gburu
n'ihi na nke ahụ ga-eme ka ọnọdụ kawanyere ya njọ.
Ekele bụ nsọpụrụ
Ụfọdụ ndị ichie obodo ahụ
ka ha wee sonye na ya bụ ụzọ ọgbara ọhụụ
Community-contributed sentences via the Common Voice platform. Wikipedia dumps and other public domain texts. Volunteer contributions from Igbo speakers and past contribute-a-thons.
| Source | Sentences |
|---|---|
| sentence-collector | 12,732 (82.7%) |
| wiki | 1,722 (11.2%) |
| IgboRadio | 931 (6.0%) |
| Other | 7 (0.0%) |
| Code | Domain | Clips | Speakers |
|---|---|---|---|
| general | General | 1 (0.0%) | 1 (0.5%) |
| agriculture_food | Agriculture and Food | 1 (0.0%) | 1 (0.5%) |
| automotive_transport | Automotive and Transport | - | - |
| finance | Finance | - | - |
| service_retail | Service and Retail | - | - |
| healthcare | Healthcare | - | - |
| history_law_government | History, Law and Government | 1 (0.0%) | 1 (0.5%) |
| media_entertainment | Media and Entertainment | 2 (0.0%) | 2 (1.1%) |
| nature_environment | Nature and Environment | - | - |
| news_current_affairs | News and Current Affairs | - | - |
| technology_robotics | Technology and Robotics | - | - |
| language_fundamentals | Language Fundamentals | 2 (0.0%) | 2 (1.1%) |
Sentences were collected through the Common Voice web platform. Basic filtering for length, profanity, and quality was applied per Mozilla guideline. No major custom processing beyond standard pipeline.
Normalize tone marks if needed -Igbo is tonal but orthography often omits some. Handle dialectal variations carefully. For ASR training, consider diacritic removal in some cases for better performance.
Each row of a tsv file represents a single audio clip, and contains the following information:
client_id - hashed UUID of a given user
path - relative path of the audio file
sentence - the sentence to be read aloud
sentence_id - unique identifier for the sentence
sentence_domain - domain classification(s) of the sentence
up_votes - number of people who said audio matches the text
down_votes - number of people who said audio does not match text
age - age of the speaker1
gender - gender of the speaker1
accents - accents of the speaker1
variant - variant of the language1
locale - locale code of the language
segment - if sentence belongs to a custom dataset segment, it will be listed here
validated_sentences.tsvThe validated_sentences.tsv file contains one row per validated sentence in the text corpus:
sentence_id - unique identifier for the sentence
sentence - the sentence text
variant - the variant of the language
sentence_domain - the domain(s) the sentence belongs to
source - the source the sentence was collected from
is_used - whether the sentence is still in circulation for recording
clips_count - number of clips recorded for this sentence
unvalidated_sentences.tsvThe unvalidated_sentences.tsv file contains one row per unvalidated sentence in the text corpus:
sentence_id - unique identifier for the sentence
sentence - the sentence text
variant - the variant of the language
sentence_domain - the domain(s) the sentence belongs to
source - the source the sentence was collected from
up_votes - number of upvotes the sentence received
down_votes - number of downvotes the sentence received
status - current status of the sentence (pending or rejected)
Igbo-specific Discord: https://discord.gg/quZYHjdHY6
Igbo WhatsApp Group: https://chat.whatsapp.com/Cgw9yD2Xt1XFm6RiJe1bwb
Igbo Contribute-a-thon events: Search ""Igbo Common Voice"" on Discourse
Eze Rita Chidera [email protected] (Igbo Community Facilitator)
This dataset is released under the Creative Commons Zero (CC-0) licence. By downloading this data you agree to not determine the identity of speakers in the dataset.
For a full list of age, gender, and accent options, see the demographics spec. These will only be reported if the speaker opted in to provide that information. ↩ ↩2 ↩3 ↩4