Al Schmitt, one of the most revered engineers and producers in the annals of the music business, winner of record 20 Grammys, has died aged 91. In 2015, he also became the first to receive a star on the Hollywood Walk of Fame. Among his recordings are Henry Mancini's 'Moon River', Neil Young's 'On the Beach', Toto's 'Africa', Ray Charles' 'Genius Loves Company', and 150 other gold or platinum records by Sam Cooke, Frank Sinatra, Natalie Cole, Bob Dylan, Miles Davis, Josh Groban, Elvis Presley and Michael Jackson.