Dave Smith Instruments SYNTHESIZERS

Hi All!
On certain Bass sounds I find the Evo's attack a little slow to get 
the punch I'm looking for. Is there a way to achieve a faster attack 
by utilizing Evolvers 3rd Envelope? If so, how do I set it up? I 
seem to remember someone mentioning using the 3rd envelope for this 
purpose.  My programming skills are still basic so any help would be 
appreciated!
Thanks,
Rick