side to function properly. Personnel The Mars Volta Omar Rodríguez-López – guitars, synthesizers, field recordings, production Cedric Bixler-Zavala – vocals Jon Theodore – drums Isaiah "Ikey" Owens – keyboards Juan Alderete de la Peña – bass Marcel Rodriguez-Lopez – percussion, keyboards Additional musicians Lenny Castro – additional percussion (all tracks) Flea – trumpet on "The Widow" and "Miranda That Ghost Just Isn't Holy Anymore" John Frusciante – first two guitar solos on "L'Via L'Viaquez" Larry Harlow – piano on "L' Via L' Viaquez", treated clavinet on "Cassandra Gemini" Adrián Terrazas-González – tenor sax, flute on "Cassandra Gemini" Salvador (Chava) Hernandez – trumpet Wayne Bergeron – trumpet Randy Jones – tuba Roger Manning – piano Nicholas Lane – trombone William Reichenbach – bass trombone David Campbell – string, brass, piano, and percussion arrangements Larry Corbett – cello Suzie Katayama – cello Violins: Fernano Moreno Erick Hernandez Diego Casillas Ernesto Molina Joel Derouin Roberto Cani Mario De Leon Peter Kent Josefina Vergara "The Coquí of Puerto Rico" Charts Weekly charts Year-end charts Singles Certifications Notes References External links The Mars Volta albums 2005 albums Concept albums Albums with cover art by Storm Thorgerson Gold Standard Laboratories albums Rock operas Albums produced by Omar Rodríguez-López Universal Records albums