Bill Porter is an American sound engineer who recorded such stars as Elvis Presley and Roy Orbison through the 1960s and 1970s. He also did concert sound for Elvis for seven years in the 1970s. In one week of 1960, his recordings accounted for 15 of Billboard Magazine's "Top 100," a feat no one has ever matched. Wikipedia
The definitive Wikipedia entry for Bill Porter. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Bill_Porter_%28audio%29