Anybody have any success creating formant (vowel) sounds from the assortment of Helix wahs and/or filters?  Any tips and tricks to share so I don't have to fork over more dough on an EHX Next Step or something similar?   As a sidebar to this - has anybody figured out a way to route a Talkbox through the Helix in such a way as to keep it totally contained?  Given the mic inputs, I'm wondering if the guitar can be routed out to the Talkbox (tube), then back in to the Helix (maybe at a custom loc