“He made strong-selling recordings of the Mormon Tabernacle Choir; worked with Dave Brubeck, Joe Williams and other jazz artists; recorded Peter, Paul and Mary; and helped engineer the string parts for Pink Floyd’s … The Wall. But he made his biggest mark in the classical world, … [where] helped shape some of the most celebrated classical recordings of the 20th century, including acclaimed sessions with Bruno Walter, Igor Stravinsky and Leonard Bernstein.”