Michael B. Tretow, the pioneering Swedish sound engineer who helped craft the signature sonic identity of ABBA, has died at age 80.
His wife and son confirmed the news to Swedish newspaper Aftonbladet, with the band’s longtime manager Görel Hanser also confirming his passing. A cause of death has not been made public.
Best known for his studio wizardry, Tretow was often referred to by fans as the unofficial “fifth member” of ABBA for his indispensable role in shaping the band’s groundbreaking sound.
He worked on every one of ABBA’s albums throughout their imperial phase, from 1973’s Ring Ring through to 1981’s The Visitors, and co-owned the group’s label, Polar Music. Notably, he was not involved in the group’s 2021 reunion album, Voyage.
”You meant more to us four in ABBA than anyone else,” Andersson told Aftonbladet. “I hope and believe that you felt it throughout all the years that have passed since we worked (and continuously laughed) in the studio. Our music lives on, it seems, and you are the one who made it timeless.”
“You were a fantastic inspirer and joy-maker, and the finest sound engineer the world has ever seen,” he said, adding: “I miss you. And I’ve saved all your coconuts!”
Björn Ulvaeus added that Tretow’s significance “cannot be overestimated,” remembering him as “a warm, generous person and a good friend.”
Anni-Frid Lyngstad said, “No one fit the bill as well as you. For us, you are forever part of the ABBA sound and you will never be forgotten.”
Agnetha Fältskog reflected on their final moments together: “So glad I got to spend some time with you a few weeks ago… You were so sick, but your laughter and humor were still there. So many memories are preserved, your encouraging words during the recordings meant so much. We are sad now, a talented and unique person has left us. Sleep well Micke, you are in our hearts forever.”
Tretow is survived by his wife and son.