ok people, i have a theory, not about the sound (the one that sounds like something made of metal having sex) but the way he does the:
A:------15-15-----15-15
C:---0------------0--------
Bit but only by playing a:
A:--3---------
C:--0---------
right, so i was experimenting with the effects on my RP2000 and i found factory set one that has a pitch shifter on it, set to +12 notes, an octave up , so, i played the chord thingy, and turned it on and off with the "control" button, which, unlike the others, isnt like a light switch (press it to turn it on, then again to turn it off) instead, its only on when the button is depressed, so i fiddled around and it works almost perfectly, there is most likly a setting on Matts All-Access (if not all multi-effects pedals) that creates this? no? so, what you thought was matt rocking the whammy, was him turning the octavater on and off?
i could be wrong but what the hey
(did anyone make any sense out of that? i didnt)