ABBA have been left in mourning following the death of their sound engineer. The family of Michael B Tretow have confirmed he has passed away at the age of 80. He was a giant in Swedish music and the ...

Trigger Warning: This article contains mention of an individual's death. Michael Tretow, the man behind many of ABBA's greatest hits, has passed away at the age of 80, as confirmed by his family. ABBA ...