The band KTL consists of guitarist / producer Stephen O’Malley (Seattle, 1974) and producer / programmer Peter Rehberg (London, 1968). O’Malley is a well-known figure in the underground scene as co-founder of noise and drone band Sun O))) and doom metal groups Burning Witch and Khanate, and as co-founder of the American metal label Southern Lord. Under the alias of Pita, Rehberg has been making radical, experimental computer music since 1982. Rehberg also runs the record label Editions Mego. In 1999 he won the Prix Ars Electronica Distinction Award. O'Malley and Rehberg first collaborated when they were approached by theatre maker Gisèle Vienne and writer Dennis Cooper to contribute to the music for their production Kindertotenlieder (2007). The dark soundtrack which they produced proved fertile ground for further collaboration: they formed KTL and jointly produced more than 20 live and studio albums. KTL create a brand of psychedelic and dark ambient noise which is almost fully improvised with influences of metal, drones, distorted samples and electronics. O'Malley and Rehberg describe their music as a “threatening new collaboration taking in parallel worlds of Extreme Computer Music and Black Metal”.