Diablo Swing Orchestra is a Swedish avant-garde metal band formed in 2003. They have released three albums: The Butcher's Ballroom (2006), Sing Along Songs for the Damned & Delirious (2009), and Pandora's Piñata (2012). The band mixes numerous influences from heavy metal, various metal subgenres including progressive and symphonic, classical music, and jazz. It was created as a sextet, but became an octet in 2011, following the addition of a trombonist and a trumpeter.