Ludwig pictured in his mastering studio in 2008.
Robert C. Ludwig (born c. 1945) is an American mastering engineer. He has 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, Queen, Jimi Hendrix, Bryan Ferry, Paul McCartney, Nirvana, Bruce Springsteen and Daft Punk resulting in over 3,000 credits. He is the recipient of numerous Grammy and TEC Awards.