TC Fireworx question

[William Walker <billwalker@baymoon.com>]

Does anyone on this list own a TC Fireworx?  I've heard its possible  
to use a modifier controlling the audio input to create a ducking  
effect for various effects but I haven't taken the time to figure it  
out and the manual is no help, I believe it has to do with using the  
envelope detection modifier assigned to effects mix, but if any one  
knows how and can save me some time I would be most appreciative. What  
I'm trying to do is ducking delay, and i think I have to assign an  
envelope detection modifier to the delay mix. Anyone know?
Thanks
  Bill