When shooting quiet events - and/or those events where the sound of the event is the main attraction, I try to keep my shooting to a minimum - focusing on the insurance shots. The 5D Mark III's Silent mode is quiet enough that I can keep shooting - and go after more unique (and lower success rate) shots such as this violinist in motion-blurred action.
Of course, the Canon EF 70-200mm f/2.8 L IS II Lens' IS was integral to being able to shoot at 1/15 second and 200mm.