Before you can automate anything, your character needs the "vocabulary" of mouth movements. In 3D animation, these are called —the visual equivalent of phonemes (sounds).
This is arguably the most powerful tool for Blender character animation. auto lip sync blender
Hover over the shape key value (0.0) and press to insert a blank keyframe. Open the Graph Editor window. Go to Channel > Bake Sound to F-Curves . Before you can automate anything, your character needs
For professional-grade productions, relying on advanced AI or premium toolsets can save hundreds of hours of production time. Before you can automate anything
Do you prefer using or are you open to paid studio tools ? What version of Blender are you currently using?