heh, like i said on vai.com, he uses patch 98 on an
alesis midiverb II w/ the blend knob at 55-60%. i'm sure you can look up the patch definitions online. (look for a midiverb II manual perhaps?)
(btw, i know this cause i've seen him do it live from very very very up close and then had a chance to check out his gear after the show. oh, and then went home and tried it on my own midiverb, lol)
~A