Many consider Roger to be the greatest producer/engineer ever, and he was behind the board for every Steely Dan album. He worked with the Beach Boys, John Denver, Dr John, Diana Ross, Stevie Wonder, Cher, Joe Cocker, CSN, Frank Sinatra, Mark Knopfler and even the Muppets. He was also known for being very generous with his time to educate and further the cause. Guys like this are hard to replace. 
