Dave May, a two-time Grammy-winning producer and longtime vp at Warner Records and Rhino Entertainment, died April 13 in Nashville of natural causes. He was 68. A driving force in modern music production and archival preservation, May paired creative vision with technical expertise. He led at the forefront of new audio formats and mastering, working on projects that ranged from studio sessions to live arena performances. In 1997, he won his first Grammy for best longform music video for Alanis Morissette’s Jagged Little Pill, Live. He received his second trophy in the same category in 2007 for Madonna’s The Confessions Tour concert film. May worked closely with many other notable artists during his career, including Metallica, Eric Clapton, Neil Young, Josh Groban, R.E.M., Cream, Green Day, Stevie Nicks, Led Zeppelin, the Eagles, Linda Ronstadt, Dream Theater, Chris Isaak, Michael Bublé and George Harrison. He began his professional career as a recording engineer in the 1970s at Pasha Studios in Hollywood. During a stint in the Warner mailroom, he answered a call for someone who could …