Reinhold Mack is a German music producer who has worked with bands like Queen and Electric Light Orchestra. His first associated act was with Queen’s album “The game”. He had a very close relationship with Queen I.E. naming John Deacon and Freddie Mercury Godfathers of one of his children and the line, “It’s gotta be Mack” in the song Dragon Attack. He also worked with Freddie on his solo albums. We don’t know anything about the man himself.