[2] He has also worked as music producer under the pseudonym Freddi Fiord (thus baptized by Joe Strummer of The Clash[5]) on recordings by Norwegian punk rock pioneers Wannskrækk and DumDum Boys.

[3] Vi was the first album of a trilogy in cooperation with Lasse Marhaug, followed by Gud (God) in 2018 and Lit (Trust) in August 2019.

[8] Knudsen has translated over 50 fiction books, including books by Charles Bukowski, William S. Burroughs, Niall Griffiths, Nick Cave, Douglas Adams, David Walliams, Edgar Rice Burroughs and Rudyard Kipling.

[9] He has also worked as a piccolo, caretaker, distribution manager, consultant for publishing and film, carpenter, stevedore, teacher, driver, tram driver in Oslo Sporveier, clerk, documentation writer in Norsk Data, copywriter in JBR advertising agency, for Filadelfia advertising agency, and as multimedia and internet developer in HEP, BeatMap and never.no AS.

He started the digital communications agency never.no AS in the autumn of 1999, where he worked as a creative leader until the end of 2001.