TLDR: Lip syncing in blender sucks, Syncnix lessens that suck.
Here’s all you need to know about Syncnix.
With the blender lip sync addon, have a character, press the ‘add Syncnix’ button and then press ‘link to Syncnix’. Your blender lip sync shape keys are controlled by the tool and it will have blender animating speech for your character as soon as you link it. Keyframe the switch around and let blender auto lip sync your characters words and most importantly, smooth the transitions in between.
We all know what we hate about tutorials these days. Let’s just not.. okay?
If you’re an advanced user, the first 60 seconds of the blender lip sync tutorial is for you. If you are a beginner, the remaining 12 minutes is for you. No hook. No spin. No fuss. Anything more and this becomes figure skating.
Do you need a character to use the tool? Nope. The Syncnix: Blender Lip Sync Addon comes with a mouth template to test with. Heck, if it looks good, just attach it to your character, I don’t care.