espeak-ng
Source offer for espeak-ng, licensed under
GPL-3.0-or-later and shipped in Morphjet's
ai-tts pack.
Note: Kokoro phonemizer — bundled subprocess, source offer like Pandoc/Poppler
Corresponding source
Morphjet distributes espeak-ng as a bundled subprocess. Under GPL-3.0-or-later we publish its complete corresponding source for download at no charge: the exact upstream version we built from, plus any Morphjet patches and the build/relocation scripts used to produce the shipped binary.
Free to anyone; a quick anti-bot check guards the file. The archive holds every version listed below, so it matches whichever build you received.
Versions shipped
Morphjet does not ship one version of espeak-ng everywhere — each platform's build channel pins its own. The archive above contains the corresponding source for every row here.
| Version | Shipped in | Built from |
|---|---|---|
1.52.0.1 (vendored in espeak-rs-sys 0.1.9) |
ai-tts/linux-x86_64, ai-tts/macos-aarch64, ai-tts/windows-x86_64 |
espeak-ng is not fetched as a release: `espeak-rs-sys` vendors it and builds it STATICALLY into `koko` (the macOS pack ships `bin/koko` and no libespeak at all). macOS additionally copies espeak-ng-data from Homebrew's espeak-ng; Linux takes the copy espeak-rs-sys just built. ⚠️ The build clones Kokoros' default branch with `--depth 1` and records no commit. b54354b is the commit that clone resolved to for the shipped macOS artifact (built 2026-07-02; b54354b landed 2026-06-19 and was HEAD). Pinning the clone is an open build fix. |
Upstream project (reference only — upstream removes old releases, which is why we host the source ourselves): https://github.com/espeak-ng/espeak-ng/releases
The full text of the GPL-3.0-or-later license ships inside the
pack (share/licenses/espeak-ng) and is reproduced in the app's About
screen. The version you are running is shown there too. The source stays
available for as long as we distribute this build. Not legal advice.