On May 7, Bob Weir will collaborate with the Marin Symphony Orchestra at the First Fusion event. This show will take place at the Marin Center in San Rafael, CA and rehearsals are well underway. As he explains in his recent site interview with Randy Ray, “Over the past year and a half, I had been working with Giancarlo [Aquilanti] on orchestrating a bunch of Grateful Dead tunes. For full orchestration, we’ve come up with about an hour’s worth of music—a bunch of fan favorites that we’ve taken our time on and fully orchestrated. It’s an adventurous approach, we took. This is not 101 Strings Do the Dead.” An initial look at the results can be seen at Weir’s Tamalpais Research Institute, where he has just posted a video that shows the musicians working on his classic composition “Let It Grow.”