We hear it every time we go to a movie, watch a play, attend a concert, listen to a lecture, attend a conference. Just as the lights go down, an omnipotent voice from the soundsystem redminds us, "Please turn off all cell phones, pagers, and other noise making devices. And remember, the taking of any photographs or video is strictly prohibited at all times." And perhaps no where in San Francisco has this admonition been more strictly enforced than in the hallowed space of Marion Davies Symphony Hall, home of the world-renowned San Francisco Symphony.
