Darcy Proper is an American mastering engineer based in Auburn, NY. In 2008, she became the first woman engineer to win a Grammy for the Best Surround Sound Album. To date, she has won four Grammy Awards and been nominated for eleven. She has mastered historical reissues for artists such as Johnny Cash, Billie Holiday, Louis Armstrong, and Frank Sinatra, and stereo releases for artists such as Steely Dan, The Eagles, Donald Fagen, and Porcupine Tree.