Build a Pose Library with 6–9 standard mouth positions (rest, closed, wide, etc.).
: Tools like 2D Lip Sync Pro are specifically optimized for Blender's 2D workflow, allowing for seamless integration with Grease Pencil objects. auto lip sync blender
If Rhubarb feels too technical, the add-on by CGDash (available on Blender Market, ~$10-20) offers a native feel. It has a built-in spectrogram and allows you to manually drag viseme bars onto a timeline while listening to audio. Build a Pose Library with 6–9 standard mouth