A list of open speech corpora for Speech Technology research and development.
This list has a preference for free (i.e. no $ cost) and truly open corpora (e.g. released under a Creative Commons license or a Community Data License Agreement). Not all these corpora may meet those criteria, but all the following corpora are accessible and usable for research and/or commercial use.
Feel free to propse additions to the list!
There's a long backlog of corpora to be added in the Issues, and Pull Requests are very welcome :)
📜 CC-0
📜 CC-BY
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| ARU Speech Corpus | English (UK) | 720 utterances / speaker | 12 (6 femals; 6 male) | http://datacat.liverpool.ac.uk/681/1/ARU_Speech_Corpus_v1_0.zip | CC-BY 3.0 |
| Althingi Parliamentary Speech Corpus | Icelandic | 542 hours and 25 minutes | 196 speakers | http://www.malfong.is/index.php?dlid=73&lang=en | CC-BY 4.0 |
| Alþingisumræður Parliamentary Speech Corpus | Icelandic | ~21 hours | http://www.malfong.is/index.php?dlid=8&lang=en | CC-BY 3.0 | |
| Hjal Corpus | Icelandic | ~41,000 recordings | 883 speakers | http://www.malfong.is/index.php?dlid=5&lang=en | CC-BY 3.0 |
| The Malromur Corpus | Icelandic | 152 hours | 563 speakers | http://www.malfong.is/index.php?dlid=65&lang=en | CC-BY 4.0 |
| Telecooperation German Corpus for Kinect | German | ~35 hours | ~180 speakers | http://www.repository.voxforge1.org/downloads/de/german-speechdata-TUDa-2015.tar.gz | CC-BY 2.0 |
| African Speech Technology English-English Speech Corpus | English | ~21 hours | https://repo.sadilar.org/handle/20.500.12185/283 | CC-BY 2.5 South Africa | |
| African Speech Technology isiXhosa Speech Corpus | isiXhosa | ~26 hours | https://repo.sadilar.org/handle/20.500.12185/305 | CC-BY 2.5 South Africa | |
| NCHLT Afrikaans | Afrikaans | 56 hours | 210 speakers (98 female / 112 male) | https://repo.sadilar.org/handle/20.500.12185/280 | CC-BY 3.0 |
| NCHLT English | English | 56 hours | 210 speakers (100 female / 110 male) | https://repo.sadilar.org/handle/20.500.12185/274 | CC-BY 3.0 |
| NCHLT isiNdebele | isiNdebele | 56 hours | 148 speakers (78 female / 70 male) | https://repo.sadilar.org/handle/20.500.12185/272 | CC-BY 3.0 |
| NCHLT isiXhosa | isiXhosa | 56 hours | 209 speakers (106 female / 103 male) | https://repo.sadilar.org/handle/20.500.12185/279 | CC-BY 3.0 |
| NCHLT isiZulu | isiZulu | 56 hours | 210 speakers (98 female / 112 male) | https://repo.sadilar.org/handle/20.500.12185/275 | CC-BY 3.0 |
| NCHLT Sepedi | Sepedi | 56 hours | 210 speakers (100 female / 110 male) | https://repo.sadilar.org/handle/20.500.12185/270 | CC-BY 3.0 |
| NCHLT Sesotho | Sesotho | 56 hours | 210 speakers (113 female / 97 male) | https://repo.sadilar.org/handle/20.500.12185/278 | CC-BY 3.0 |
| NCHLT Setswana | Setswana | 56 hours | 210 speakers (109 female / 101 male) | https://repo.sadilar.org/handle/20.500.12185/281 | CC-BY 3.0 |
| NCHLT Siswati | Siswati | 56 hours | 197 speakers (96 female / 101 male) | https://repo.sadilar.org/handle/20.500.12185/271 | CC-BY 3.0 |
| NCHLT Tshivenda | Tshivenda | 56 hours | 208 speakers (83 female / 125 male) | https://repo.sadilar.org/handle/20.500.12185/276 | CC-BY 3.0 |
| NCHLT Xitsonga | Xitsonga | 56 hours | 198 speakers (95 female/103 male) | https://repo.sadilar.org/handle/20.500.12185/277 | CC-BY 3.0 |
| Lwazi II Cross-lingual Proper Name Corpus | Afrikaans; English; isiZulu; Sesotho | 2 hours 5 mins | 20 speakers | https://repo.sadilar.org/handle/20.500.12185/445 | CC-BY 3.0 |
| Lwazi II Proper Name Call Routing Telephone Corpus | English | 2 hours 7 mins | https://repo.sadilar.org/handle/20.500.12185/448 | CC-BY 3.0 | |
| Lwazi II Afrikaans Trajectory Tracking Corpus | Afrikaans | 4 hours | one male | https://repo.sadilar.org/handle/20.500.12185/442 | CC-BY 3.0 |
| LibriSpeech | English | ~1000 hours | 2484 speakers (1201 female / 1283 male) | http://www.openslr.org/12/ | CC-BY 4.0 |
| Zeroth-Korean | Korean | 52.8 hours | 115 speakers | http://www.openslr.org/40/ | CC-BY 4.0 |
| Speech Commands | English | 17.8 hours | >1,000 speakers | https://ai.googleblog.com/2017/08/launching-speech-commands-dataset.html | CC-BY 4.0 |
| ParlamentParla | Catalan | 320 hours | https://www.openslr.org/59/ | CC-BY 4.0 | |
| SIWIS | French | ~10 hours | one female | http://datashare.is.ed.ac.uk/download/DS_10283_2353.zip | CC-BY 4.0 |
| VCTK | English | 44 hours | 109 speakers | http://datashare.is.ed.ac.uk/download/DS_10283_3443.zip | CC-BY 4.0 |
| LibriTTS | English | 586 hours | 2,456 speakers (1,185 female / 1,271 male) | http://www.openslr.org/60/ | CC-BY 4.0 |
| Augmented LibriSpeech | Audio (English); Text (English, French) | 236 hours | https://persyval-platform.univ-grenoble-alpes.fr/datasets/DS91 | CC-BY 4.0 | |
| Helsinki Prosody Corpus | English | 262.5 hours | 1,230 speakers | https://github.com/Helsinki-NLP/prosody | CC-BY 4.0 |
| Tuva Speech Database | Norwegian | 24 hours | 40 speakers | https://www.nb.no/sprakbanken/show?serial=oai:nb.no:sbr-44&lang= | CC-BY 4.0 |
| COERLL Kʼicheʼ corpus | Kʼicheʼ | 34 minutes | ? speakers | https://cl.indiana.edu/~ftyers/resources/utexas-kiche-audio.tar.gz | CC-BY 4.0 |
| Timers and Such v0.1 | English (synthetic: US, real: various nationalities) | synthetic: 172 hours, real: 0.29 hours | 21 synthetic, 11 real | https://zenodo.org/record/4110812#.X9j0RmBOkYM | CC-BY 4.0 |
| Large Corpus of Czech Parliament Plenary Hearings | Czech | 444 hours | https://lindat.mff.cuni.cz/repository/xmlui/handle/11234/1-3126 | CC-BY 4.0 |
📜 CC-BY-SA
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| Iban | Iban | 8 hours | http://www.openslr.org/24/ https://github.com/sarahjuan/iban | CC-BY-SA 2.0 | |
| Vystadial 2013 | English; Czech | 41 hours; 15 hours | http://www.openslr.org/6/ | CC-BY-SA 3.0 US | |
| Vystadial 2016 Czech | Czech | 77 hours; includes Vystadial 2013 Czech | https://lindat.cz/repository/xmlui/handle/11234/1-1740 | CC-BY-SA 4.0 | |
| Free Spoken Digit Dataset | English | 2,000 isolated digits | 4 speakers | https://github.com/Jakobovski/free-spoken-digit-dataset | CC-BY-SA 4.0 |
| Google Javanese | Javanese | 296 hours | 1019 speakers | http://www.openslr.org/35/ | CC-BY-SA 4.0 |
| Google Nepali | Nepali | 165 hours | 527 speakers | http://www.openslr.org/54/ | CC-BY-SA 4.0 |
| Google Bengali | Bengali | 229 hours | 508 speakers | http://www.openslr.org/53/ | CC-BY-SA 4.0 |
| Google Sinhala | Sinhala | 224 hours | 478 speakers | http://www.openslr.org/52/ | CC-BY-SA 4.0 |
| Google Sundanese | Sundanese | 333 hours | 542 speakers | http://www.openslr.org/36/ | CC-BY-SA 4.0 |
| Spoken Wikipedia Corpus (SWC-2017) | English; German; Dutch | 182 hours; 249 hours; 79 hours | 395 speakers; 339 speakers; 145 speakers | https://nats.gitlab.io/swc/ | CC-BY-SA 4.0 |
| Chuvash TTS | Chuvash | 4 hours | 1 speaker | https://github.com/ftyers/Turkic_TTS | CC-BY-SA 4.0 |
| Forschergeist | German | 2 hours | 2 speakers (1 female; 1 male) | female speaker: https://goofy.zamia.org/zamia-speech/corpora/forschergeist/annettevogt-20180320-rec.tgz; male speaker: https://goofy.zamia.org/zamia-speech/corpora/forschergeist/timpritlove-20180320-rec.tgz | CC-BY-SA 4.0 |
| Malayalam Speech Corpus by SMC | Malayalam | 1:36 hours | 75 speakers (3 female, 12 male, 60 unidentified) | https://releases.smc.org.in/msc-reviewed-speech/ | CC-BY-SA 4.0 |
| Google Malayalam | Malayalam | 3.02 hours | 24 speakers | http://www.openslr.org/63/ | CC-BY-SA 4.0 |
📜 CC-BY-ND
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| IBM Recorded Debates v1 | English | 5 hours | 10 speakers | https://www.research.ibm.com/haifa/dept/vst/debating_data.shtml#Debate%20Speech%20Analysis | CC-BY-ND |
| IBM Recorded Debates v2 | English | ~14 hours | 14 speakers | https://www.research.ibm.com/haifa/dept/vst/debating_data.shtml#Debate%20Speech%20Analysis | CC-BY-ND |
📜 CC-BY-NC
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| TV3Parla | Catalan | 240 hours | http://laklak.eu/share/tv3_0.3.tar.gz | CC-BY-NC 4.0 | |
| Russian Open STT Corpus | Russian | ~10,000 hours public, ~10,000 more upon request | https://github.com/snakers4/open_stt/#links | CC-BY-NC 4.0 with some exceptions | |
| Russian Open TTS Corpus | Russian | 145 hours | 3 males | https://github.com/snakers4/open_tts/#links | CC-BY-NC 4.0 with some expections |
| OVM – Otázky Václava Moravce | Czech | 35 hours | https://lindat.mff.cuni.cz/repository/xmlui/handle/11858/00-097C-0000-000D-EC98-3 | CC-BY-NC 3.0 |
📜 CC-BY-NC-SA
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| CHiME-Home | English | 6.8 hours | https://archive.org/details/chime-home | CC-BY-NC-SA 3.0 | |
| Cameroon Pidgin English Corpus | Cameroon Pidgin English | ~17 hours | http://ota.ox.ac.uk/text/2563.zip | CC-BY-NC-SA 3.0 |
📜 CC-BY-NC-ND
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| Tatoeba-Eng | English | ~250 hours (rough estimate) | 6 speakers | https://voice.mozilla.org/en/datasets | CC-BY-NC 4.0 (some audio) / CC-BY-NC-ND 3.0 (most audio) / CC-BY 2.0 (all text) |
| TED-LIUM | English | 118 hours | 685 speakers (36h female / 81h male) | http://www.openslr.org/7/ | CC-BY-NC-ND 3.0 |
| TED-LIUM-2 | English | 207 hours | 1242 speakers (66h female / 141h male) | http://www.openslr.org/19/ | CC-BY-NC-ND 3.0 |
| TED-LIUM-3 | English | 452 hours | 2028 speakers (134h female / 316h male) | http://www.openslr.org/51/ | CC-BY-NC-ND 3.0 |
| Pansori TEDxKR | Korean | 3 hours | 41 speakers | http://www.openslr.org/58/ | CC-BY-NC-ND 4.0 |
| Primewords Mandarin | Mandarin | 100 hours | 296 speakers | http://www.openslr.org/47/ | CC-BY-NC-ND 4.0 |
| MuST-C v1.0 | Audio (English); Text (Dutch, French, German, Italian, Portuguese, Romanian, Russian, Spanish) | 408, 504, 492, 465, 442, 385, 432, 489 hours per language pair | https://ict.fbk.eu/must-c-release-v1-0/ | CC-BY-NC-ND 4.0 | |
| Czech Parliament Meetings | Czech | 88 hours | https://lindat.mff.cuni.cz/repository/xmlui/handle/11858/00-097C-0000-0005-CF9C-4 | CC-BY-NC-ND 3.0 | |
| BembaSpeech | Bemba | 24 hours | 17 speakers (9 male / 8 female) | https://github.com/csikasote/BembaSpeech | CC-BY-NC-ND 4.0 |
📜 CDLA-Permissive
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| DiPCo | English | ~5 hours | 32 speakers (13 female; 19 male) | https://s3.amazonaws.com/dipco/DiPCo.tgz | CDLA-Permissive-1.0 |
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| VoxForge | English | ~120 hours | ~2966 speakers | http://www.repository.voxforge1.org/downloads/en/Trunk/Audio/Main/16kHz_16bit/ https://voice.mozilla.org/en/datasets | GNU-GPL 3.0 |
| VoxForge | Russian | http://www.repository.voxforge1.org/downloads/ru/Trunk/Audio/Main/16kHz_16bit/ http://www.repository.voxforge1.org/downloads/Russian/Trunk/Audio/Main/16kHz_16bit/ | GNU-GPL 3.0 | ||
| VoxForge | German | http://www.repository.voxforge1.org/downloads/de/Trunk/Audio/Main/16kHz_16bit/ | GNU-GPL 3.0 |
📜 Apache License
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| AISHELL-1 | Mandarin | 170 hours | 400 speakers | http://www.openslr.org/33/ | Apache 2.0 |
| Tunisian_MSA | Modern Standard Arabic (Tunisia) | 11.2 hours | 118 speakers | http://www.openslr.org/46/ | Apache 2.0 |
| African Accented French | French | 22 hours | 232 speakers | http://www.openslr.org/57/ | Apache 2.0 |
| THCHS-30 | Mandarin Chinese | 33.57 hours (13,389 utterances) | 40 speakers (31 female; 9 male) | http://www.openslr.org/18/ | Apache 2.0 |
| Living Audio Dataset - Dutch | Dutch | 57:49 min | 1 speaker | https://github.com/Idlak/Living-Audio-Dataset | Apache 2.0 |
| Living Audio Dataset - English | English | 50:50 min | 1 speaker | https://github.com/Idlak/Living-Audio-Dataset | Apache 2.0 |
| Living Audio Dataset - Irish | Irish | 61:56 min | 1 speaker | https://github.com/Idlak/Living-Audio-Dataset | Apache 2.0 |
| Living Audio Dataset - Russian | Russian | 34:58 min | 1 speaker | https://github.com/Idlak/Living-Audio-Dataset | Apache 2.0 |
📜 MIT License
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| ALFFA | Amharic;Hausa (paid); Swahili; Wolof | http://www.openslr.org/25/ https://github.com/besacier/ALFFA_PUBLIC | MIT |
📜 BSD 3-Clause License
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| M-AILABS German Corpus | German | 237 hours and 22 minutes | http://www.caito.de/data/Training/stt_tts/de_DE.tgz | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | |
| M-AILABS Queen's English Corpus | Queen's English | 45 hours and 35 minutes | http://www.caito.de/data/Training/stt_tts/en_UK.tgz | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | |
| M-AILABS US English Corpus | American English | 102 hours and 7 minutes | http://www.caito.de/data/Training/stt_tts/en_US.tgz | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | |
| M-AILABS Spanish Corpus | Spanish Spanish | 108 hours and 34 minutes | http://www.caito.de/data/Training/stt_tts/es_ES.tgz | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | |
| M-AILABS Italian Corpus | Italian | 127 hours and 40 minutes | http://www.caito.de/data/Training/stt_tts/it_IT.tgz | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | |
| M-AILABS Ukrainian Corpus | Ukrainian | 87 hours and 8 minutes | http://www.caito.de/data/Training/stt_tts/uk_UK.tgz | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | |
| M-AILABS Russian Corpus | Russian | 46 hours and 47 minutes | http://www.caito.de/data/Training/stt_tts/ru_RU.tgz | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | |
| M-AILABS French-v0.9 Corpus | French | 190 hours and 30 minutes | http://www.caito.de/data/Training/stt_tts/fr_FR.tgz | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | |
| M-AILABS Polish Corpus | Polish | 53 hours and 50 minutes | http://www.caito.de/data/Training/stt_tts/pl_PL.tgz | M-AILABS LICENSE (a data-specific BSD 3-Clause License) |