by Charley3D·Motion Graphics
Images © Charley3D. Used for product review; image policy.
Lip Sync stands out in the Blender extensions library for bundling its speech and phoneme pipeline — Vosk, eSpeak NG and Phonemizer — so analysis runs offline once the language model is cached locally. At the time of listing it had over 36,000 downloads, making it a practical pick for audio-driven mouth animation.
Lip Sync is a Blender add-on from Charley3D that generates mouth animation directly from a voice recording. Load an audio clip, run the analysis, and the add-on extracts phonemes and writes keyframes for your character's mouth, so no manual keyframing is required. It can drive 3D shape keys or 2D spritesheet mouth shapes, and it integrates with Blender's Video Sequencer. Support for Pose Library animation is listed as upcoming.
Under the hood, the add-on combines Vosk for offline speech recognition, a custom build of eSpeak NG for converting text into timed phoneme sequences, and Phonemizer for phoneme segmentation across languages. More than 25 languages are supported, including English, French, Spanish, German, Russian, Hindi and Mandarin. On first use it downloads the Vosk model for the chosen language, then caches it locally for faster re-analysis and fully offline work afterward.
It runs on Windows, macOS (Intel and Apple Silicon) and Linux, and requires Blender 4.4 or newer. Lip Sync is released under the GNU General Public License v3.0 or later, and a video trailer accompanies the listing.
Lip Sync is best for blender artists animating character dialogue who want mouth movement generated from an audio track rather than keyframed by hand.
Lip Sync is completely free to download and use.
Lip Sync is compatible with Blender 4.4 and newer, and the current release is version 2.3.2. It supports macOS on both Apple Silicon and Intel, Windows and Linux. The add-on requests file access to import models and extract libraries to disk, and network access to download voice models. On the Blender extensions site it is listed under the Animation and Sequencer categories.
Lip Sync supports more than 25 languages, including English, French, Spanish, German, Russian, Hindi and Mandarin. It combines Vosk for speech recognition, a custom build of eSpeak NG for timed phoneme sequences, and Phonemizer for phoneme segmentation across languages. On first use, the add-on downloads the Vosk model for the language you select and caches it locally, so later analyses in that language reuse the stored model rather than downloading it again.
Lip Sync works fully offline after setup. The first time you use a language, it downloads the required Vosk model over the network, then caches that model on your system. After that there are no repeated downloads and analysis runs offline. The bundled eSpeak NG and Vosk components ship with the add-on for Windows, macOS and Linux. Note that audio analysis can take time depending on your computer.
Lip Sync installs by dragging the downloaded add-on into Blender, or by downloading it and using Install from Disk. Platform-specific builds are provided for Windows, macOS Intel, macOS Apple Silicon and Linux. Once installed, it can generate 3D shape key animation or 2D spritesheet mouth shapes and plug into Blender's Video Sequencer. Support for Pose Library animation is listed as upcoming.
Lip Sync is listed as free in this catalog and is released under the GNU General Public License v3.0 or later. For current licensing terms and the full source, check the developer's page. The add-on is developed by Charley3D, and its most recent update, version 2.3.2, included a bug fix in the animator when baking audio with no pose set for the silence viseme.
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