Hubardo is the sixth album, a concept double album, by Kayo Dot, self-released and funded through pre-orders on frontman Toby Driver's Ice Level Records in 2013. It is the follow up to Gamma Knife, which was released in 2012. It is Kayo Dot's longest album and its first double album, and contains aspects of black metal, post-rock, jazz fusion, and chamber music. It is considered a throwback to maudlin of the Well and early Kayo Dot recordings, containing much more metal-style harsh vocals by Driver and collaborator Jason Byron than any Kayo Dot album. It also contains much more repetition, metal riffs, overdubs, polyrhythms, and double bass drums than past Kayo Dot albums, while maintaining the band's typical wide-ranging jazz- and chamber music-influenced orchestration. It was picked as the 4th best album of 2013 on indie music website SputnikMusic. Hubardo was co-produced by Driver and longtime producer Randall Dunn. Occasional collaborator and former maudlin of the Well vocalist Jason Byron recorded his first vocal performance since 2002's maudlin of the Well album Leaving Your Body Map on the song "The Black Stone". He also wrote the lyrics for the album and a 40-page book, entitled "The Sword of Satan", packed with the vinyl copy of the album detailing the story behind Hubardo. After leaving Hydra Head Records and releasing Gamma Knife independently, Driver crowdfunded the album entirely through pre-orders on independent music website Bandcamp. Shortly after the releas