Here’s a neat 20-second timelapse video of the stage set-up and dress rehearsal for John Cage’s Song Books, with Michael Tilson Thomas, Joan La Barbara, Meredith Monk, and Jessye Norman and the San Francisco Symphony. You can’t hear the blender whir, but you can get some idea of what will unfold when the musicians perform Song Books again together, Wednesday, March 14 in San Francisco, March 23 at Hill Auditorium in Ann Arbor, and at Carnegie Hall in New York March 27.