Hello.  I am having problems making the mouth open more when an avatar is speaking.  I am using the following code:
	Code:
	vizact.speak(speechfile,2.0, 'mouth_open', 2.0))
 
I thought this should amplify the lips by 2.  It looks like they barely move their lips.  So then I tried making it 10 or even 100 and it did nothing!!  
I also don't understand what the 4th argument (threshold) is.  I just usually set it to be the same as the scale argument....
thanks!
Maria