John Morgan Eargle (6 January 1931 in Tulsa, Oklahoma – 9 May 2007 in Hollywood, California) was an Oscar- and Grammy-winning audio engineer and a musician (piano and church and theater organ). He was the Chief Engineer for Delos International, author of seminal textbooks on audio, a consultant (and vice president of engineering) for 31 years at JBL, and past president and fellow of the Audio Engineering Society.