Omar Rodríguez-López is the composer, lead guitarist and producer for the progressive rock group The Mars Volta and the former guitarist for the post-hardcore outfit At the Drive-In. This guy has a pretty extensive guitar rig. He has a ton of effects pedals! Let's look at some of the gear and equipment that has been seen in Mars Volta's Omar Rodriguez's guitar rig. - Fulltone Ultimate Octavemore
["This is the effect I used on the intro lead to “Before Tomorrow Comes.” It's an extremely versatile distortion/fuzz with an octave-up switch. It’s a great effect to kick on when you want to push your lead tone into extreme territory."](http://www.premierguitar.com/articles/20392-mark-tremontis-top-5-amps-and-myles-kennedys-top-5-pedals?page=3)more
Nowadays Andy’s been using a somewhat simpler rig. He has a Ernie Ball volume pedal, Klon Centaur overdrive, Menatone Red Snapper OD, Fulltone Ultimate Octave, couple of pedals from Red Witch including Empress Chorus and Moon Phaser, and a couple of rack effects like Eventide Eclipse Multi-Effects Processor, TC Electronics 1210 Spatial Expander and the Lexicon PCM70 Reverb.more
At 10.39 onwards Dave talks about his pedal rig. https://youtu.be/88vqY618SUk?t=639 Jim Dunlop Cry Baby Wah Jim Dunlop Rotovibe EaethQuaker Devices Palisades Fulltone Ultimate Octave Fuzz TC Electronic T2 Hall of Fame EarthQuaker Devices Dispatch Master TC Electronic Flashback Triple Delay Mantic Flex Malekko Scrutatormore
I believe this pedal is a highly refined foxx tone machine octave fuzz. If you want Octavia look at fulltones smaller octave box. I enjoyed this pedal but prefer the more subtle, always-on univox/FZ-2/standard fuzz type of sound personally... all in all Mike Fuller did a great job with the ultimate octave tonally on both the fuzz and octave sections and it has a really low noise floor for this sort of effect.