Kenneth "Wilkie" Wilkinson, a veteran sound engineer and a key player in the development of Decca Record Company's pioneering digital recording system, died Jan. 13 in Norfolk, England. He was 91.

Kenneth "Wilkie" Wilkinson, a veteran sound engineer and a key player in the development of Decca Record Company's pioneering digital recording system, died Jan. 13 in Norfolk, England. He was 91.

Wilkinson started working for Decca in 1937, when it bought the Crystalate Company, where he was then working. At Decca, he worked with legendary classical recording artists such as Sir Georg Solti, Dame Joan Sutherland and Benjamin Britten.

Over the years, he helped design mixing desks and advance microphone techniques. He was also instrumental in the creation of sound-frequency enhancement systems, which were used by submarines during World War II before being applied to recording techniques in studios.

He retired from Decca in 1980 and is survived by his wife Gladys.