Jack Douglas, the influential rock producer and audio engineer known for work with John Lennon and major acts including Aerosmith, dies at 80, according to multiple outlets. Billboard, Variety, Stereogum, Rolling Stone, and the New York Times report that Douglas died on Monday, May 11, and that the news comes from a family statement or social media post. Several publications cite that his career spanned landmark recordings across the 1970s and early 1980s. Among the best-known albums associated with Douglas are Aerosmith records such as “Get Your Wings,” “Rocks,” and “Toys in the Attic,” as well as Cheap Trick’s debut album and Patti Smith’s “Radio Ethiopia.” The New York Times also credits him with helping shape sounds on tracks including “Walk This Way” and “(Just Like) Starting Over.” Variety notes his production work on John Lennon and Yoko Ono’s “Double Fantasy.” Other sources add that Douglas worked with artists including Lou Reed, Alice Cooper, the Who, and the New York Dolls. One report states he dies after a battle with lymphoma, while others do not specify a cause of death.