💎 Open Speech Corpora
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
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| Common Voice | Multilingual | >15,000 hours (validated); >20,000 hours (total) | Multi-speaker | CC-0 | |
| Yesno | Hebrew | 6 mins | one male | CC-0 | |
| LJ Speech Corpus | English | ~24 hours | one female | CC-0 | |
| NST Danish ASR Database | Danish | 229,992 utterances | 616 speakers | original: , reorganized: | CC-0 |
| NST Danish Dictation | Danish | 34,955 utterances | 151 speakers | CC-0 | |
| NST Danish Speech Synthesis | Danish | 4,108 utterances | 1 male speaker | CC-0 | |
| NST Swedish ASR Database | Swedish | 366,000 utterances | 1,000 speakers | original: , reorganized: | CC-0 |
| NST Swedish Dictation | Swedish | 45,620 utterances | 195 speakers | CC-0 | |
| NST Swedish Speech Synthesis | Swedish | 5,279 utterances | 1 male speaker | CC-0 | |
| NST Norwegian ASR Database | Norwegian | 359,760 utterances | 980 speakers | original: , reorganized: | CC-0 |
| NST Norwegian Dictation | Norwegian | 33,360 utterances | 144 speakers | CC-0 | |
| NST Norwegian Speech Synthesis | Norwegian | 5,363 utterances | 1 male speaker | CC-0 | |
| NB Tale – Speech Database for Norwegian | Norwegian | 7,600 utterances + ~12 hours | 380 speakers | CC-0 | |
| Norwegian Parliamentary Speech Corpus (v0.1) | Norwegian | ~59 hours | 203 speakers | CC-0 | |
| Wikimedia Commons Odia | Odia | ~8 hours | ~20 speakers | mostly(?) CC-0 | |
| Thorsten-21.02-neutral | German | ~24 hours | 1 male speaker | CC-0 | |
| Thorsten-21.06-emotional | German | 2.400 utterances (8 emotions) | 1 male speaker | CC-0 |
📜 CC-BY
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| ARU Speech Corpus | English (UK) | 720 utterances / speaker | 12 (6 femals; 6 male) | CC-BY 3.0 | |
| Althingi Parliamentary Speech Corpus | Icelandic | 542 hours and 25 minutes | 196 speakers | CC-BY 4.0 | |
| Alþingisumræður Parliamentary Speech Corpus | Icelandic | ~21 hours | CC-BY 3.0 | ||
| Hjal Corpus | Icelandic | ~41,000 recordings | 883 speakers | CC-BY 3.0 | |
| The Malromur Corpus | Icelandic | 152 hours | 563 speakers | CC-BY 4.0 | |
| Telecooperation German Corpus for Kinect | German | ~35 hours | ~180 speakers | CC-BY 2.0 | |
| African Speech Technology English-English Speech Corpus | English | ~21 hours | CC-BY 2.5 South Africa | ||
| African Speech Technology isiXhosa Speech Corpus | isiXhosa | ~26 hours | CC-BY 2.5 South Africa | ||
| NCHLT Afrikaans | Afrikaans | 56 hours | 210 speakers (98 female / 112 male) | CC-BY 3.0 | |
| NCHLT English | English | 56 hours | 210 speakers (100 female / 110 male) | CC-BY 3.0 | |
| NCHLT isiNdebele | isiNdebele | 56 hours | 148 speakers (78 female / 70 male) | CC-BY 3.0 | |
| NCHLT isiXhosa | isiXhosa | 56 hours | 209 speakers (106 female / 103 male) | CC-BY 3.0 | |
| NCHLT isiZulu | isiZulu | 56 hours | 210 speakers (98 female / 112 male) | CC-BY 3.0 | |
| NCHLT Sepedi | Sepedi | 56 hours | 210 speakers (100 female / 110 male) | CC-BY 3.0 | |
| NCHLT Sesotho | Sesotho | 56 hours | 210 speakers (113 female / 97 male) | CC-BY 3.0 | |
| NCHLT Setswana | Setswana | 56 hours | 210 speakers (109 female / 101 male) | CC-BY 3.0 | |
| NCHLT Siswati | Siswati | 56 hours | 197 speakers (96 female / 101 male) | CC-BY 3.0 | |
| NCHLT Tshivenda | Tshivenda | 56 hours | 208 speakers (83 female / 125 male) | CC-BY 3.0 | |
| NCHLT Xitsonga | Xitsonga | 56 hours | 198 speakers (95 female/103 male) | CC-BY 3.0 | |
| Lwazi II Cross-lingual Proper Name Corpus | Afrikaans; English; isiZulu; Sesotho | 2 hours 5 mins | 20 speakers | CC-BY 3.0 | |
| Lwazi II Proper Name Call Routing Telephone Corpus | English | 2 hours 7 mins | CC-BY 3.0 | ||
| Lwazi II Afrikaans Trajectory Tracking Corpus | Afrikaans | 4 hours | one male | CC-BY 3.0 | |
| LibriSpeech | English | ~1000 hours | 2484 speakers (1201 female / 1283 male) | CC-BY 4.0 | |
| Zeroth-Korean | Korean | 52.8 hours | 115 speakers | CC-BY 4.0 | |
| Speech Commands | English | 17.8 hours | >1,000 speakers | CC-BY 4.0 | |
| ParlamentParla | Catalan | 320 hours | CC-BY 4.0 | ||
| SIWIS | French | ~10 hours | one female | CC-BY 4.0 | |
| VCTK | English | 44 hours | 109 speakers | CC-BY 4.0 | |
| LibriTTS | English | 586 hours | 2,456 speakers (1,185 female / 1,271 male) | CC-BY 4.0 | |
| Augmented LibriSpeech | Audio (English); Text (English, French) | 236 hours | CC-BY 4.0 | ||
| Helsinki Prosody Corpus | English | 262.5 hours | 1,230 speakers | 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 | CC-BY 4.0 |
📜 CC-BY-SA
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| Iban | Iban | 8 hours | CC-BY-SA 2.0 | ||
| Vystadial 2013 | English; Czech | 41 hours; 15 hours | CC-BY-SA 3.0 US | ||
| Vystadial 2016 Czech | Czech | 77 hours; includes Vystadial 2013 Czech | CC-BY-SA 4.0 | ||
| Free Spoken Digit Dataset | English | 2,000 isolated digits | 4 speakers | CC-BY-SA 4.0 | |
| Google Javanese | Javanese | 296 hours | 1019 speakers | CC-BY-SA 4.0 | |
| Google Nepali | Nepali | 165 hours | 527 speakers | CC-BY-SA 4.0 | |
| Google Bengali | Bengali | 229 hours | 508 speakers | CC-BY-SA 4.0 | |
| Google Sinhala | Sinhala | 224 hours | 478 speakers | CC-BY-SA 4.0 | |
| Google Sundanese | Sundanese | 333 hours | 542 speakers | 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 | CC-BY-SA 4.0 | |
| Chuvash TTS | Chuvash | 4 hours | 1 speaker | CC-BY-SA 4.0 | |
| Forschergeist | German | 2 hours | 2 speakers (1 female; 1 male) | female speaker: ; male speaker: | 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 | CC-BY-SA 4.0 |
📜 CC-BY-ND
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| IBM Recorded Debates v1 | English | 5 hours | 10 speakers | CC-BY-ND | |
| IBM Recorded Debates v2 | English | ~14 hours | 14 speakers | CC-BY-ND |
📜 CC-BY-NC
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| TV3Parla | Catalan | 240 hours | CC-BY-NC 4.0 | ||
| Russian Open STT Corpus | Russian | ~10,000 hours public, ~10,000 more upon request | CC-BY-NC 4.0 with some exceptions | ||
| Russian Open TTS Corpus | Russian | 145 hours | 3 males | CC-BY-NC 4.0 with some expections | |
| OVM – Otázky Václava Moravce | Czech | 35 hours | CC-BY-NC 3.0 |
📜 CC-BY-NC-SA
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| CHiME-Home | English | 6.8 hours | CC-BY-NC-SA 3.0 | ||
| Cameroon Pidgin English Corpus | Cameroon Pidgin English | ~17 hours | 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 | 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) | CC-BY-NC-ND 3.0 | |
| TED-LIUM-2 | English | 207 hours | 1242 speakers (66h female / 141h male) | CC-BY-NC-ND 3.0 | |
| TED-LIUM-3 | English | 452 hours | 2028 speakers (134h female / 316h male) | CC-BY-NC-ND 3.0 | |
| Pansori TEDxKR | Korean | 3 hours | 41 speakers | CC-BY-NC-ND 4.0 | |
| Primewords Mandarin | Mandarin | 100 hours | 296 speakers | 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 | CC-BY-NC-ND 4.0 | ||
| Czech Parliament Meetings | Czech | 88 hours | CC-BY-NC-ND 3.0 | ||
| BembaSpeech | Bemba | 24 hours | 17 speakers (9 male / 8 female) | CC-BY-NC-ND 4.0 |
📜 CDLA-Permissive
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| DiPCo | English | ~5 hours | 32 speakers (13 female; 19 male) | CDLA-Permissive-1.0 |
📜 GNU General Public License
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| VoxForge | English | ~120 hours | ~2966 speakers | GNU-GPL 3.0 | |
| VoxForge | Russian | GNU-GPL 3.0 | |||
| VoxForge | German | GNU-GPL 3.0 |
📜 Apache License
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| AISHELL-1 | Mandarin | 170 hours | 400 speakers | Apache 2.0 | |
| Tunisian_MSA | Modern Standard Arabic (Tunisia) | 11.2 hours | 118 speakers | Apache 2.0 | |
| African Accented French | French | 22 hours | 232 speakers | Apache 2.0 | |
| THCHS-30 | Mandarin Chinese | 33.57 hours (13,389 utterances) | 40 speakers (31 female; 9 male) | Apache 2.0 | |
| Living Audio Dataset - Dutch | Dutch | 57:49 min | 1 speaker | Apache 2.0 | |
| Living Audio Dataset - English | English | 50:50 min | 1 speaker | Apache 2.0 | |
| Living Audio Dataset - Irish | Irish | 61:56 min | 1 speaker | Apache 2.0 | |
| Living Audio Dataset - Russian | Russian | 34:58 min | 1 speaker | Apache 2.0 |
📜 MIT License
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| ALFFA | Amharic;Hausa (paid); Swahili; Wolof | MIT |
📜 BSD 3-Clause License
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| M-AILABS German Corpus | German | 237 hours and 22 minutes | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | ||
| M-AILABS Queen's English Corpus | Queen's English | 45 hours and 35 minutes | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | ||
| M-AILABS US English Corpus | American English | 102 hours and 7 minutes | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | ||
| M-AILABS Spanish Corpus | Spanish Spanish | 108 hours and 34 minutes | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | ||
| M-AILABS Italian Corpus | Italian | 127 hours and 40 minutes | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | ||
| M-AILABS Ukrainian Corpus | Ukrainian | 87 hours and 8 minutes | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | ||
| M-AILABS Russian Corpus | Russian | 46 hours and 47 minutes | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | ||
| M-AILABS French-v0.9 Corpus | French | 190 hours and 30 minutes | M-AILABS LICENSE (a data-specific BSD 3-Clause License) | ||
| M-AILABS Polish Corpus | Polish | 53 hours and 50 minutes | M-AILABS LICENSE (a data-specific BSD 3-Clause License) |
📜 Custom License
| CORPUS | LANGUAGES | # HOURS | # SPEAKERS | DOWNLOAD | LICENSE |
|---|---|---|---|---|---|
| Fluent Speech Commands Corpus | English | 19 hours (30,043 utterances) | 97 speakers | Fluent Speech Commands Public License | |
| CMU Wilderness | 700 Langs | Alignments distributed without audio or text total:~14,000 hours; per lang: ~20 hours | |||
| CHiME-5 | English | 50 hours | 48 speakers | CHiME-5 License | |
| Fearless Steps Corpus | English | 19,000 hours (20 hours transcribed) | ~450 speakers | NASA Media Usage Guidelines | |
| Microsoft Speech Corpus (Indian languages) | Telugu; Tamil; Gujarati | Microsoft Speech Corpus (Indian Languages) License | |||
| Microsoft Speech Language Translation Corpus | English; Chinese; Japanese | Microsoft Research Data License Agreement | |||
| Hey Snips Corpus | English | 11K positive "Hey Snips" (~4.4 hours) and 87K negative (~89 hours) utterances | 2215 speakers (positive & negative) and 4028 speakers (negative only) | Snips Data License | |
| Snips SLU Corpus | English; French | 1660 "Smart Lights EN" (~1.3 hours), 1286 "Smart Speaker EN" (~55 minutes), 1138 "Smart Speaker FR" (~50 minutes) utterances | English: 69 speakers; French: 30 speakers | Snips Data License | |
| CMU Sphinx Group - AN4 | English | "an4_clstk"(~50 minutes) "an4test_clstk" (~6 minutes) | "an4_clstk": 21 female, 53 male "an4test_clstk": 3 female, 7 male | http://www.speech.cs.cmu.edu/databases/an4/an4_raw.bigendian.tar.gz | AN4 |
| FT Speech | Danish | ~1,857 hours (1,017,244 utterances) | 434 speakers (176 female, 258 male) | FT Speech License | |
| FalaBrasil-LAPS-Constituicao | Brazilian-Portuguese | 9 hours | 1 speaker | "Bases de áudio transcrito e bases de texto normalizadas (sem pontuação, com números escritos por extenso, etc.) disponibilizadas de forma gratuita* pelo Grupo FalaBrasil. [disponibilizadas de forma gratuita*] / Portanto, apenas as bases livres estão sendo disponibilizadas." | |
| FalaBrasil-LaPSMail | Brazilian-Portuguese | 1 hour | 25 speakers | "Bases de áudio transcrito e bases de texto normalizadas (sem pontuação, com números escritos por extenso, etc.) disponibilizadas de forma gratuita* pelo Grupo FalaBrasil. [disponibilizadas de forma gratuita*] / Portanto, apenas as bases livres estão sendo disponibilizadas." | |
| FalaBrasil-LaPS Benchmark | Brazilian-Portuguese | 1 hour | 1 speaker | "Bases de áudio transcrito e bases de texto normalizadas (sem pontuação, com números escritos por extenso, etc.) disponibilizadas de forma gratuita* pelo Grupo FalaBrasil. [disponibilizadas de forma gratuita*] / Portanto, apenas as bases livres estão sendo disponibilizadas." |