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ATGCLVLSSCAP is the twelfth studio album by Norwegian experimental collective Ulver. Written, performed and produced by Ulver, the album was released on 22 January 2016 via newly formed, London-based label House of Mythology.

The music was culled from multitrack recordings made at twelve different improvisatory "free rock" live shows the band performed in February 2014, and later edited and enhanced in the studio by Daniel O'Sullivan. The album has been described as "Ultimately a piece of work that exists above and beyond any conventional live recording, rather a hallucinatory travelogue as potent an experience to bear witness to as it was to construct."

On 30 October 2015 the song "Cromagnosis" was broadcast on Baba Yaga’s Hut via online radio station Resonance FM, and later uploaded to Mixcloud.

The song "Moody Stix" features samples from the song "Doom Sticks" from A Quick Fix of Melancholy. "Glammer Hammer" reinterprets "Glamour Box (Ostinati)" from Messe I.X-VI.X. "Nowhere (Sweet Sixteen)" is a new arrangement of "Nowhere/Catastrophe", and "Ecclesiastes (A Vernal Catnap)" reinterprets the ending of "Tomorrow Never Knows"; both original songs are from Perdition City. "England's Hidden" contains vocal samples of "England" from Wars of the Roses.

The album's title, ATGCLVLSSCAP, is an initialism referring to the first letter of each twelve signs of the zodiac, from Aries to Pisces.

On 2 January 2014 Ulver announced an 11-date European tour: "the February dates will consist of partly new and improv-based material, likely to revolve around motifs already familiar to our familiars. We had a good experience doing just that (improv) in Oslo in August, so a more free-ranging form is what we are aiming for this time. We are looking forward to get out there, and hope for some interesting music to be born those evenings and nights. We also aim to document some of it for those of you who cannot come." Kristoffer Rygg added, "The tour was to be an experiment, kind of loose and scary for a band as 'set in their ways' as us... It is partly borne out of that feeling, being a bit bored with the circumstances. It was quite liberating to do something more in the moment. One night a jam could be five minutes, and the next it could be fifteen. We couldn’t have captured these songs in a studio environment."

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