When I am animating a lip sync I always like to work out the shape of all the mouths. When I start animating I cross out any shape that doesn’t work.
Here is the dope sheet, I must say it was bothersome having to listen to the track over and over again in other to record it on the dope sheet. But when it was time to animate all that hard work paid off because it made animating very easy as the timing had already been decided on the dope sheet.
This is my idea for the lip sync exercise.