Bob Ludwig

Robert C. Ludwig (born c. 1945) is an American mastering engineer. He mastered recordings on all the major recording formats for all the major record labels, and on projects by more than 1,300 artists, including Led Zeppelin, Lou Reed, Metallica, Queen, Jimi Hendrix, Bryan Ferry, Paul McCartney, Nirvana, Bruce Springsteen and Daft Punk, with more than 3,000 credits. He is the recipient of 13 Grammy and other awards. Ludwig retired in 2023. Provided by Wikipedia