What is the standard list of Ch mouth positions?
Hi,
I've seen Ch mouths with: Ah, D, Ee, F, K, L, M, Oh, R, S, Th, Uh, W-Oo, smile, neutral, and surprised.
Is there a list of standard mouth positions approved by you guys? And are the unused letters (G, P, etc) usable?
Thank you.
Evan

