Common Voice Scripted Speech 24.0 - English

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License:

CC0-1.0

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Steward:

Common Voice

Task: ASR

Release Date: 12/5/2025

Format: MP3

Size: 87.74 GB


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Description

A collection of scripted spoken phrases in English.

Considerations

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

Processes

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.

Metadata

English — English (en)

This datasheet has been generated automatically, we would love to include more information, if you would like to help out, get in touch!

This datasheet is for version 24.0 of the the Mozilla Common Voice Scripted Speech dataset for English (en). The dataset contains 2569108 clips representing 3779.23 hours of recorded speech (2750.41 hours validated) from 99289 speakers.

Language

Variants

Demographic information

The dataset includes the following distribution of age and gender.

Gender

Self-declared gender information, percentage refers to the number of clips annotated with this gender.

GenderPercentage
Undefined39.0%
Male Masculine43.0%
Female Feminine18.0%

Age

Self-declared age information, percentage refers to the number of clips annotated with this age band.

Age BandPercentage
Undefined36.0%
Twenties25.0%
Thirties14.0%
Teens6.0%
Fourties9.0%
Fifties5.0%
Sixties4.0%
Seventies1.0%

Data splits for modelling

The official data splits for modelling this language are as follows. Of the validated clips, 63.16% are included in the splits.

SplitCount
Train1143276
Test16402
Dev16402

Text corpus

The text corpus contains 1716010 sentences, of which 1680665 are validated, 35345 are invalidated and 9705 are reported.

Writing system

Symbol table

Sample

There follows a randomly selected sample of five sentences from the corpus.

Bio spent seven years at Bo School, rising to become school Prefect.
His philosophical and philological critiques of Neo-Confucianism continue to be influential.
It will then follow it exact same routing back to Bethesda.
The Fredericksburg and Spotsylvania National Military Park includes three cemeteries.
These are called "un-cemented", "air-spaced" or "broken contact" doublets.

Sources

Text domains

DomainCount
Undefined2567905
Agriculture Food161
Automotive Transport8
Finance44
Service Retail29
General644
Healthcare25
History Law Government120
Language Fundamentals10
Media Entertainment115
Nature Environment55
News Current Affairs13
Technology Robotics98

Processing

Recommended post-processing

Fields

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

  • text - supposed transcription of the audio

  • 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

  • accent - accent of the speaker1

  • segment - if sentence belongs to a custom dataset segment, it will be listed here

Get involved!

Community links

Discussions

Contribute

Acknowledgements

Datasheet authors

Citation guidelines

Funding

Licence

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.

Footnotes

  1. For a full list of age, gender, and accent options, see the demograpics spec. These will only be reported if the speaker opted in to provide that information. 2 3