Bass player Rudy Sarzo (who has played with many well known bands including Quiet Riot, Ozzy Osbourne, Whitesnake, Dio, Blue Öyster Cult, Geoff Tate’s Queensrÿche, and more) discusses the magic of Ronnie James Dio, shares memories of working with him in Dio, and tells us one of the most important things he’s learned from Ronnie.