Demetrio Castellucci and Massimo Pupillo present the music of Sleep Technique, a Dewey Dell performance inspired by the Chauvet cave and its cave paintings. On disc, the music is reborn, offering an immersion into the depths of sound particles, humid electro-acoustic rhythms, the repetitive forms of speleothems, and the electric bass that scrapes the walls, sculpting them into concave or convex surfaces. A voice of incredible slowness, yet in constant motion, like the millennia-long and incessant erosion of water. The album traverses the cave backward, from its deepest chamber to its entrance. Demetrio Castellucci is a composer and sound designer who has worked in theater, choreography, and cinema since 2004. Around the same time, he also performed as a DJ, favoring an omnitemporal approach to dance that transcends musical genres. Since 2006, he has been a member of the Dewey Dell dance company, and since 2007, he has been active under the name Black Fanfare, a maximalist electro-acoustic project. He has collaborated on performances by Andreco and Enrico Ticconi/Ginevra Panzetti, as well as films by Ahmed Ben Nessib, Beatrice Pucci, and Ilaria di Carlo. After living in London and Berlin, he settled in Vilnius, where in 2018 he founded Unarcheology, a digital platform for music distribution and radio. He is also active under the name Airport Gad, an ambient project which, with Unarcheology, launched its own "Airline": concerts in a cardboard flight simulator, where the pilots are also the musicians. Massimo Pupillo is best known as a founding member of the band Zu, with whom he has released 18 albums and performed over 2,000 concerts worldwide. He has always cultivated a very open and multidisciplinary approach that has led him to collaborate with some of the most renowned figures in the contemporary art world: South African photographer Roger Ballen, actors Malcolm McDowell and Marton Csokas, Romeo Castellucci and Chiara Guidi of Societas Raffaello Sanzio, American choreographer Meg Stuart, poetess Anne Waldman, and Italian poet Gabriele Tinti, among others. He has collaborated on stage and in the studio with avant-garde musicians and composers such as Alvin Curran, the piano duo Katia and Marielle Labèque, and classical virtuosos like Viktoria Mullova and Giovanni Sollima. He has also worked with iconic figures from the international rock scene, including Mike Patton, Thurston Moore, Jim O'Rourke (Sonic Youth), Guy Picciotto and Joe Lally (Fugazi), Buzz Osborne (Melvins), and Damo Suzuki (CAN). In the field of improvised music, he has collaborated with Peter Brötzmann, Toshinori Kondo, Mats Gustafsson, Ken Vandermark, and Tony Buck, among others. In the experimental music scene, he has collaborated with artists such as Oren Ambarchi, David Tibet (Current 93), Thighpaulsandra (Coil), Stephen O'Malley (Sunn O))), Abul Mogard, Mick Harris (Scorn), Gordon Sharp (This Mortal Coil), FM Einheit (Einstürzende Neubauten), and many others. In cinema, he composed the music for Kirill Serebrennikov.