American audio engineer
According to Wikipedia,
Bob Katz is an American audio mastering engineer and author of a popular book on audio mastering. Katz has mastered three Grammy Award–winning albums and one nominated album. Projects he has worked on have received Grammys and acclaim from audiophiles, and his book on mastering is considered by some to be the "definitive work on mastering".
Bob Katz is affiliated with the following schools: