Hailed by The New Yorker as 'perhaps the most musically adventurous act currently signed to a major label' and by Rolling Stone as 2008's Best Prog-Rock Band, The Mars Volta makes its Warner Bros. debut with Octahedron, the highly acclaimed group's fifth studio album. Following 2008's The Bedlam In Goliath-its third consecutive album to debut Top 10-which featured 'Wax Simulacra,' Grammy winner for Best Hard Rock Performance, The Mars Volta's punkperverted neo-psychedelia goes acoustic on Octahedron. Says the band's Cedric Bixler Zavala: 'There's electricity throughout it! But that's what our band does-celebrate mutations.'

+ John Frusciante on guitars

Omar Rodríguez-López – guitar, synthesizers, drum programming (7), direction, arrangements
Cedric Bixler-Zavala – vocals, lyrics
John Frusciante – guitar
Juan Alderete – bass guitar
Thomas Pridgen – drums
Marcel Rodríguez-López – keyboards, synthesizers, mellotron, percussion
Isaiah "Ikey" Owens (though credited, did not play on the album)[3]

Mark Aanderud – additional piano
Jeremy Michael Ward - intro recording