The Mars Volta is a band that prides itself on combining progressive rock with jazz fusion and Latin American music, having energetic live shows, and being completely unlistenable.
(aka the Mars Volta's members and what their job are.)
Job: Creating lyrics/gibberish, wailing.
To his credit, Zavala sounds kind of like Robert Plant. However, while Plant sang mostly about babes he was gonna leave and occasionly made some songs about Lord of the Rings-related stuff, all of Zavala's songs are based on the things that a crazy homeless man sees after he looses his tinfoil hat.
Job: Guitar (Electric/acoustic/Lovecraftian)
Lopez's can do two things with his guitar: take you to a magical realm the likes of which you've never seen, or make you hate having the ability to hear. "Televators" has some nice stuff in it, and "L'Via L'Viaquez" has a pretty groovy riff, but for God's sake, every time he steps on one of those distortion/wammy pedals or uses "dissonance" it's like having your brain get kicked in the dick.
OTHER MUSICIANS: COMING SOON.