Octahedron is the fifth studio album by American progressive rock band The Mars Volta, released on June 23, 2009 by Warner Bros. in North America and Mercury Records worldwide. Omar Rodríguez-López had discussed the band's next album as early as January 2008, the month that The Bedlam in Goliath was released, claiming "I consider it to be our acoustic album." Cedric Bixler Zavala has also spoken of the album as "acoustic" and "mellow," yet stated: "We know how people can be so linear in their way of thinking, so when they hear the new album, they're going to say, 'This Read more on Last.fm.