KeySprout’s letter sounds and long vowels are studio phonics recordings by Kathryn Davis, supplied by Straight Truth Press, LLC. The remaining sounds (digraphs, vowel teams, r-controlled vowels) come from the International Phonetic Alphabet audio on Wikimedia Commons, used under the Creative Commons Attribution-ShareAlike 3.0 license (one file is public domain). Consonants were isolated from the recorded vowel context; files were trimmed, resampled, and normalized; composite sounds were made by crossfading two recordings. Our derived audio files are likewise available under CC BY-SA 3.0.
| Sound | Source | License | Author |
|---|---|---|---|
| /a_long/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /a_short/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /ar/ | composite of Open back unrounded vowel.ogg + Alveolar approximant.ogg | CC BY-SA 3.0 | Erutuon, No machine-readable author provided. Denelson83 assumed (based on copyright claims). |
| /aw/ | Open-mid back rounded vowel.ogg | CC BY-SA 3.0 | No machine-readable author provided. Denelson83 assumed (based on copyright claims). |
| /b/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /ch/ | Voiceless palato-alveolar affricate.ogg | CC BY-SA 3.0 | Peter Isotalo |
| /d/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /e_long/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /e_short/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /er/ | composite of Mid-central vowel.ogg + Alveolar approximant.ogg | CC BY-SA 3.0 | Erutuon, No machine-readable author provided. Denelson83 assumed (based on copyright claims). |
| /f/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /g/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /h/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /i_long/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /i_short/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /j/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /k/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /ks/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /kw/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /l/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /m/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /n/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /ng/ | Velar nasal.ogg | CC BY-SA 3.0 | unknown |
| /o_long/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /o_short/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /oi/ | composite of Open-mid back rounded vowel.ogg + Near-close near-front unrounded vowel.ogg | CC BY-SA 3.0 | No machine-readable author provided. Denelson83 assumed (based on copyright claims). |
| /oo_long/ | Close back rounded vowel.ogg | CC BY-SA 3.0 | No machine-readable author provided. Denelson83 assumed (based on copyright claims). |
| /oo_short/ | Near-close near-back rounded vowel.ogg | CC BY-SA 3.0 | No machine-readable author provided. Denelson83 assumed (based on copyright claims). |
| /or/ | composite of Open-mid back rounded vowel.ogg + Alveolar approximant.ogg | CC BY-SA 3.0 | Erutuon, No machine-readable author provided. Denelson83 assumed (based on copyright claims). |
| /ou/ | composite of Open front unrounded vowel.ogg + Near-close near-back rounded vowel.ogg | CC BY-SA 3.0 | No machine-readable author provided. Denelson83 assumed (based on copyright claims)., No machine-readable author provided. Denelson83 assumed (based on copyright claims). |
| /p/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /r/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /s/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /schwa/ | Mid-central vowel.ogg | CC BY-SA 3.0 | No machine-readable author provided. Denelson83 assumed (based on copyright claims). |
| /sh/ | Voiceless palato-alveolar sibilant.ogg | CC BY-SA 3.0 | Peter Isotalo |
| /t/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /th/ | Voiceless dental fricative.ogg | CC BY-SA 3.0 | unknown |
| /th_voiced/ | Voiced dental fricative.ogg | CC BY-SA 3.0 | unknown |
| /u_long/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /u_short/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /v/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /w/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /wh/ | Voiced labio-velar approximant.ogg | CC BY-SA 3.0 | unknown |
| /y/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /z/ | Recorded by Kathryn Davis (2018); supplied by Straight Truth Press, LLC | Owner-supplied recording | Kathryn Davis |
| /zh/ | Voiced palato-alveolar sibilant.ogg | CC BY-SA 3.0 | Peter Isotalo |
Letter-name audio is synthesized with Windows Speech. Spoken instructions use your device’s own speech synthesis.
© 2026 Straight Truth Press, LLC.