how do i set the wah 1 octave up with the boss gt8 for the solo invincible from muse?

i have a gt-8, and i did use the pitch shifter or something, but it sounds crap.
after that, i used pedal band (+12), sounds better, but still very crappy.

so now i play the solo without the octave-thing

(cause you're talking about the solo, right?)