Okay saw Doyle Bramhall II the other night here in the "People's Republic of Austin" and damn!!!! Anyway interesting setup, Univibe, Vox Wah, Rotosphere, KOT, etc. But there was something I was not familiar with COB (Clean Octave Boost?). Curious to know any information anyone might have on function, etc.
Hey, it's nice to see a fellow Austinite in the forums! Where in Austin did you see Doyle? I'd love to go to one of his shows (in hopes that Clapton would pop onstage :D).
Is this what you're looking for?
http://filters.muziq.be/model/prescription/cob
Check out the POG [polyphonic octave generator] Electro-Harmonix.
There's a pretty nice demonstration on Ytube
Saw him at Antone's with Gary Clarke Jr. on rhythm guitar and John Mayer's drummer. I made a boo boo. It is actually the Clean Octave Blend.