== Discography ===== As an artist ===* "Mikael & Michael" (1966, with Mikael Ramel)* "Let's boogie" (1976)* "Michael B. Tretow" (1982)* "Tomteland" (1985)* "Den makalösa manicken" (1986, under the pseudonym Professorn)* "Trafik-Trolle" (early 1980s)* "Caramba" (1981, with Ted Gärdestad)* "Hystereo Hi-lites" (1989)* "Greatest Hits" (1999)=== As producer ===* Lena Andersson: "Det Bästa Som Finns" (1977)* ABBA: "Gracias Por La Música" (1980)* ABBA: "ABBA Live" (1986)* Big Money: "Lost In Hollywood" (1992)* Big Money: "Moonraker" (1994)=== As engineer ===* Björn Ulvaeus & Benny Andersson: "Lycka" (1970)* Lena Andersson: "Lena 15" (1971)* Lena Andersson: "Lena" (1971)* Ted Gärdestad: "Undringar" (1972)* Lena Andersson: "12 Nya Visor" (1972)* Björn & Benny, Agnetha & Frida (ABBA): "Ring Ring" (1972-1973)* Ted Gärdestad: "Ted" (1973)* Svenne & Lotta: "Oldies But Goodies" (1973)* ABBA (Björn & Benny, Agnetha & Frida): "Waterloo" (1974)* Ted Gärdestad: "Upptåg" (1974)* Svenne & Lotta: "2/Bang-A-Boomerang" (1975, engineer and co-producer)* ABBA: "ABBA" (1975)* ABBA: "Greatest Hits" (1975-1976)* Anni-Frid Lyngstad: "Frida ensam" (1975)* ABBA: "Arrival" (1976)* Ted Gärdestad: "Franska Kort" (1976, engineer and co-producer)* Svenne & Lotta: "Letters" (1976, engineer and co-producer)* ABBA: "The Album" (1977)* ABBA: "Voulez-Vous" (1979)* ABBA: "Greatest Hits Vol.
* "Mikael & Michael" (1966, с Mikael Ramel)* "Let’s boogie" (1976)* "Michael B. Tretow" (1982)* "Tomteland" (1985)* "Den makalösa manicken" (1986, под псевдонимом Professorn)* "Trafik-Trolle" (начало 1980-х)* "Caramba" (1981, с Ted Gärdestad)* "Hystereo Hi-lites" (1989)* "Greatest Hits" (1999)* Lena Andersson: "Det Bästa Som Finns" (1977)* ABBA: "Gracias Por La Música" (1980)* ABBA: "ABBA Live" (1986)* Big Money: "Lost In Hollywood" (1992)* Big Money: "Moonraker" (1994)* Björn & Benny: "Lycka" (1970)* Lena Andersson: "Lena 15" (1971)* Lena Andersson: "Lena" (1971)* Ted Gärdestad: "Undringar" (1972)* Lena Andersson: "12 Nya Visor" (1972)* Björn & Benny, Agnetha & Frida (ABBA): "Ring Ring" (1972—1973)* Ted Gärdestad: "Ted" (1973)* Svenne & Lotta: "Oldies But Goodies" (1973)* ABBA (Björn & Benny, Agnetha & Frida): "Waterloo" (1974)* Ted Gärdestad: "Upptåg" (1974)* Svenne & Lotta: "2/Bang-A-Boomerang" (1975, инженер и сопродюсер)* ABBA: "ABBA" (1975)* ABBA: "Greatest Hits" (1975—1976)* Анни-Фрид Люнгстад: "Frida ensam" (1975)* ABBA: "Arrival" (1976)* Ted Gärdestad: "Franska Kort" (1976, инженер и сопродюсер)* Svenne & Lotta: "Letters" (1976, инженер и сопродюсер)* ABBA: "The Album" (1977)* ABBA: "Voulez-Vous" (1979)* ABBA: "Greatest Hits Vol.