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Each work and recording keeps its own terms. Individual authors, editions, changes and source credits are listed with the material and in each downloaded source package. Source-specific exceptions and regional restrictions still apply.

• Project Gutenberg ↗U.S. public-domain text; Project Gutenberg terms and regional limits apply
• OpenStax ↗CC BY 4.0 for the retained source editions and original prose
• BCcampus Open Education ↗CC BY 4.0 for the retained original prose; third-party exceptions excluded
• PLOS ↗Article-specific CC BY 4.0 original prose
• Frontiers ↗Article-specific CC BY 4.0 original prose
• Wikipedia ↗CC BY-SA 4.0 text, with source-specific exceptions
• English Wikiquote ↗CC BY-SA 4.0 editorial arrangement; quoted works keep separate rights
• Wikimedia Commons / Spoken Wikipedia ↗Individual recording licences, including CC BY, CC BY-SA, CC0 and public domain
• LibriSpeech / LibriVox readers ↗LibriSpeech recordings: CC BY 4.0; source books have separate text rights
• FLEURS / FLORES-200 / Wikinews ↗FLEURS recordings: CC BY 4.0; FLORES transcripts: CC BY-SA 4.0, retaining original article terms
• VOA Learning English ↗Credited original VOA productions; third-party material has separate rights
• NOAA ↗Selected NOAA public information; retained exceptions, credit and no-endorsement terms
• USGS ↗Selected USGS-authored text: U.S. public domain; regional limits retained
• NASA ↗Selected factual/editorial text under NASA reuse guidelines; no endorsement
• John F. Kennedy Presidential Library ↗Selected original federal-duty speech text and recordings; individual source terms apply
• Eisenhower Presidential Library / NARA ↗Selected original federal-duty speeches; U.S. public domain and regional limits retained
• Lingfern original dialogues ↗CC BY 4.0 for original dialogue text

• English Wikiquote ↗CC BY-SA 4.0 editorial arrangement; original quotation rights retained.

Source and reuse notes ↗

A1 word listening and IPA chart example words use Wikimedia Commons recordings by Dvortygirl, CC BY-SA 3.0. File credits.

• Rice University address — 12 September 1962 ↗John F. Kennedy; White House Audio Collection · JFK Library archival recording (public domain)Original speech recording excerpt 409.04–557.6 seconds; decoded, trimmed and transcoded to 96 kbps MP3. Sample timestamps reset; no pitch or playback-speed change.
• Inaugural address — 20 January 1961 ↗John F. Kennedy; White House Audio Collection · JFK Library archival recording (public domain)Original speech recording excerpt 465.14–604.3 seconds; decoded, trimmed and transcoded to 96 kbps MP3. Sample timestamps reset; no pitch or playback-speed change.
• American University address — 10 June 1963 ↗John F. Kennedy; White House Audio Collection · JFK Library archival recording (public domain)Original speech sample-time excerpt 1230.64–1596.48 seconds. Decoded to mono 16 kHz PCM with sample timestamps reset, trimmed and transcoded to 96 kbps MP3; no playback-speed or pitch change. Source Ogg granule timestamp warnings are retained as acquisition diagnostics; final clip fully decodes without warnings.
• United Nations address — 20 September 1963 ↗John F. Kennedy; White House Audio Collection · JFK Library archival recording (public domain)Original speech sample-time excerpt 736.8–942.32 seconds. Decoded to mono 16 kHz PCM with sample timestamps reset, trimmed and transcoded to 96 kbps MP3; no playback-speed or pitch change. Source Ogg granule timestamp warnings are retained as acquisition diagnostics; final clip fully decodes without warnings.
• Farewell address: balance and democratic accountability (1961) ↗Dwight D. Eisenhower; original presidential recording, Eisenhower Presidential Library/NARA · Original United States federal-government address; public domain in the United StatesOfficial edition preserves original wording; unspoken section numerals removed. ASR misrecognises some terms and plurals, and merges paragraph boundaries. Evidence uses bounded whole segments; independent listening/transcript/suitability and regional rights review pending.
• Atoms for Peace: purposes and qualified proposals (1953) ↗Dwight D. Eisenhower; original presidential recording, Eisenhower Presidential Library/NARA · Original United States federal-government address; public domain in the United StatesOfficial edition preserves original wording; unspoken section numerals removed. ASR misrecognises some terms and plurals, and merges paragraph boundaries. Evidence uses bounded whole segments; independent listening/transcript/suitability and regional rights review pending.
• Welcome! ↗VOA Learning English · VOA Learning English original production (public domain)Original conversation text and audio retained. Timing is ASR-assisted; independent editorial/listening review pending.
• Hello, I’m Anna! ↗VOA Learning English · VOA Learning English original production (public domain)Original conversation text retained; audio clipped after Nice to meet you to exclude the unprinted closing. Timing is ASR-assisted; independent editorial/listening review pending.
• Where Are You? — short sentences ↗VOA Learning English · VOA Learning English original production (public domain)Original reading conversation excerpts retained; short listening clips use exact-token-matched official utterances and complete ASR segment evidence. Speaker labels are unspoken transcript aids. Independent editorial/listening and source-specific exception review pending.
• Where Is the Gym? — short conversation ↗VOA Learning English · VOA Learning English original production (public domain)Original reading conversation excerpts retained; short listening clips use exact-token-matched official utterances and complete ASR segment evidence. Speaker labels are unspoken transcript aids. Independent editorial/listening and source-specific exception review pending.
• I’m Here! ↗VOA Learning English · VOA Learning English original production (public domain)Original conversation excerpt through Goodbye, Anna; audio clipped to 101.9 seconds without re-encoding. PDF differs from the recording in the excluded closing; independent listening/editorial review pending.
• What Is It? ↗VOA Learning English · VOA Learning English original production (public domain)Original conversation text/audio retained. An ASR closing beyond measured duration is not adopted; independent listening/editorial review pending.
• What Are You Doing? ↗VOA Learning English · VOA Learning English original production (public domain)Conversation excerpts retained; speaker labels and stage notes are unspoken transcript aids. ASR omits the greeting filler Uh; original official transcript retained. Earlier Anne repetitions and later Caty/name differences excluded from listening. Evidence utterances match exact spoken tokens; no human approval. Independent suitability and source-specific exception review pending.
• Are You Busy? ↗VOA Learning English · VOA Learning English original production (public domain)Conversation excerpts retained; speaker labels and stage notes are unspoken transcript aids. ASR omits hesitation Um and spells spoken Ms as Miss. Source retains official spelling and stage labels. Official 5:00 p.m. and ASR 5 p.m. denote the same hour; whole segment timing retained, no word-level times inferred. Closing party/Phew excluded. Independent suitability and source-specific exception review pending.
• How to Summon Others ↗John Russell · VOA Learning English original production (public domain)Contiguous author-only text excerpt. Audio clipped from 44.3 to 113.3 seconds without re-encoding; opening reader question and unrelated closing excluded. Text heading may be unspoken. Independent listening/editorial review pending.
• Appeal ↗Andrew Smith · VOA Learning English original production (public domain)Contiguous author-only text excerpt. Audio clipped from 17.3 to 117.1 seconds without re-encoding; opening reader question and unrelated closing excluded. Text heading may be unspoken. Independent listening/editorial review pending.
• Using the Phonetic Alphabet ↗Andrew Smith · VOA Learning English original production (public domain)Original contiguous author excerpt; opening reader letter excluded. Opening listener letter/name excluded. ASR spells the spoken cat phonemes as letters C A T, rather than the official IPA symbols; that phoneme demonstration is not scored or accepted as exact-token evidence. Official phonetic notation retained in the transcript. Model recognition of N-E-E-D/I is not used for scoring. Independent source-specific exception and editorial/suitability review pending.
• Notes about ‘Being’ ↗Andrew Smith · VOA Learning English original production (public domain)Original contiguous author excerpt; opening reader letter excluded. Opening listener letter/name excluded. Later basketball-name ASR differences Manute/Minute versus source Manut excluded. Adopted evidence matches original author words with complete segment times; no inferred word timestamps. Independent source-specific exception and editorial/suitability review pending.
• Do People Still Say That? ↗Andrew Smith · VOA Learning English original production (public domain)Contiguous author text excerpt, with unspoken heading retained where present. Audio clipped 83.1–137.3 seconds without re-encoding; reader question, images and unrelated closing excluded. Independent listening/editorial review pending.
• Kinds and Types ↗Andrew Smith · VOA Learning English original production (public domain)Contiguous author text excerpt, with unspoken heading retained where present. Audio clipped 37.5–126.0 seconds without re-encoding; reader question, images and unrelated closing excluded. Independent listening/editorial review pending.
• Practice Your Listening ↗Andrew Smith · VOA Learning English original production (public domain)Original author explanation only; reader letter, introduction and closing contact invitation excluded. Headings/bullet formatting are unspoken transcript aids. Adopted evidence matches spoken tokens; name recognition outside the excerpt is not used. Independent boundary, transcript, suitability and rights review pending.
• Learning English Expressions or Idioms ↗Andrew Smith · VOA Learning English original production (public domain)Original author explanation only; reader letter, introduction and closing contact invitation excluded. Headings/bullet formatting are unspoken transcript aids. Adopted evidence matches spoken tokens; name recognition outside the excerpt is not used. Independent boundary, transcript, suitability and rights review pending.
• Learning to Read in Safaliba Helps Ghanaian Kids Learn English (2015) ↗VOA Learning English — Jill Robbins, Jim Tedder; interview: Paul Schaefer · VOA Learning English original production (public domain)Dated2015 report, not current national statistics. Images and glossary excluded. ASR has multiple unrecognized local names; official name spelling retained, not used for exact-token scoring. Official page says working to change that; recording transcript says working to expand its use. Listening uses that recording wording. The interview adds And then she said, well, you know before the child-education proposal; listening retains those spoken words. No scored evidence uses those discrepancies. Independent transcript/name/boundary/suitability/rights review pending.
• How to Inspect Your Own Writing (2020) ↗Jill Robbins, VOA Learning English · VOA Learning English original production (public domain)Dated2020 explanatory report, not a live recommendation about external tools. Opening learner question, closing name, images and glossary excluded. Headings and displayed quotation-mark symbols are unspoken aids. ASR publish versus official punish is a recognition discrepancy, not adopted as scoring evidence. No external writing service requested. Independent transcript/boundary/suitability/rights review pending.
• When Do I Start? — opening excerpt ↗VOA Learning English · VOA Learning English original production (public domain)Original 0–19 seconds; transcoded with FFmpeg to 96 kbps MP3. No speech synthesis, speed or pitch changes.

• /i/ ↗Denelson83 and file-history contributors (see source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɪ/ ↗Denelson83 and file-history contributors (see source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɛ/ ↗RoachPeter · CC BY-SA 4.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes.
• /æ/ ↗Denelson83 and file-history contributors (see source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɑ/ ↗Denelson83 and file-history contributors (see source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɔ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded to MP3 with FFmpeg qscale 4; metadata removed. No trimming, pitch, speed or gain changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʊ/ ↗Denelson83 and file-history contributors (see source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /u/ ↗Denelson83 and file-history contributors (see source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʌ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded to MP3 with FFmpeg qscale 4; metadata removed. No trimming, pitch, speed or gain changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ə/ ↗Denelson83 and file-history contributors (see source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɝ, ɚ/ ↗Dvortygirl · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /eɪ/ ↗Muke Tever · Public domainWikimedia Commons MP3 transcode; no local trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /aɪ/ ↗Muke Tever · Public domainLocally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɔɪ/ ↗Speaker: Arlo Barnes Recorder: Arlo Barnes · CC0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes.
• /aʊ/ ↗Speaker: Pvanp7 Recorder: Pvanp7 · CC0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes.
• /oʊ/ ↗DroEsperanto · Public domainLocally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes.
• /p/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /b/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes.
• /t/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes.
• /d/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes.
• /k/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes.
• /ɡ/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Locally transcoded original recording to MP3 with FFmpeg qscale 4; no trimming or pitch changes.
• /f/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded to MP3 with FFmpeg qscale 4; metadata removed. No trimming, pitch, speed or gain changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /v/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded to MP3 with FFmpeg qscale 4; metadata removed. No trimming, pitch, speed or gain changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /θ/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ð/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /s/ ↗Peter Isotalo · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /z/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /ʃ/ ↗Peter Isotalo · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /ʒ/ ↗Peter Isotalo · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /h/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /tʃ/ ↗Peter Isotalo · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /dʒ/ ↗The original uploader was Octane at English Wikipedia. · Public domainWikimedia Commons MP3 transcode; no local trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /m/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /n/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /ŋ/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /l/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /ɹ/ ↗Erutuon · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /j/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes.
• /w/ ↗Peter Isotalo (recording credited on source page) · CC BY-SA 3.0Wikimedia Commons MP3 transcode; no local trimming or pitch changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /y/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɨ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʉ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɯ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʏ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /e/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ø/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɘ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɵ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɤ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /o/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /œ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded to MP3 with FFmpeg qscale 4; metadata removed. No trimming, pitch, speed or gain changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɜ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɞ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɐ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded to MP3 with FFmpeg qscale 4; metadata removed. No trimming, pitch, speed or gain changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /a/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded to MP3 with FFmpeg qscale 4; metadata removed. No trimming, pitch, speed or gain changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɶ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɒ/ ↗Denelson83 · CC BY-SA 3.0Full original recording transcoded to MP3 with FFmpeg qscale 4; metadata removed. No trimming, pitch, speed or gain changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʈ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɖ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /c/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɟ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /q/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɢ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ʔ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɱ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɳ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɲ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɴ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ʙ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /r/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ʀ/ ↗Denelson83 (talk) (Uploads) · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ⱱ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɾ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɽ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɸ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /β/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʂ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ʐ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ç/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. Gain reduced by3dB to keep decoded peaks below full scale. No trimming, pitch, speed or channel changes.
• /ʝ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /x/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɣ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /χ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʁ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ħ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʕ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɦ/ ↗Peter Isotalo (credited as Karmosin) · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɬ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɮ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded to MP3 with FFmpeg qscale 4; metadata removed. No trimming, pitch, speed or gain changes.
• /ʋ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɻ/ ↗Peter Isotalo (credited as Karmosin) · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɰ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɭ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ʎ/ ↗Peter Isotalo (original source revision380892; file-history contributors credited at source) · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ʟ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ʘ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɓ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /pʼ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ǀ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ǃ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɗ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /tʼ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ǂ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʄ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɠ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /kʼ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʛ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ǁ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /sʼ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʍ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɥ/ ↗Speaker: WikiLucas00 Recorder: WikiLucas00 · CC BY-SA 4.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ʜ/ ↗Adamsa123 · CC BY-SA 4.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. Gain reduced by3dB to keep decoded peaks below full scale. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʢ/ ↗Adamsa123 · CC BY-SA 4.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʡ/ ↗Adamsa123 · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɕ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʑ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɺ/ ↗Eshaan011 · CC0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /ɧ/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /t͡s/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /t͡ɕ/ ↗Halibutt · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. Gain reduced by3dB to keep decoded peaks below full scale. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ʈ͡ʂ/ ↗Halibutt · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. Gain reduced by3dB to keep decoded peaks below full scale. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /d͡z/ ↗Peter Isotalo · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.
• /d͡ʑ/ ↗Halibutt · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes. Prepended a short silent lead-in (287 ms decoded) with lossless MP3 frame concatenation; all original speech frames are retained without re-encoding.
• /ɖ͡ʐ/ ↗Halibutt · CC BY-SA 3.0Full original recording transcoded locally to MP3 with FFmpeg qscale4; metadata removed. No trimming, pitch, speed or channel changes.