I plan to shoot a classical pianist friend during an upcoming solo performance in a fancy gallery space. Unfortunately, the size of the space and composition (the place is practically all marble) will not allow me to shoot without seriously disrupting the performance for the small audience (this is a serious NYC crowd). From the other threads, there were suggestions to only shoot during the 'loud' parts of the program and stand far away from the audience. I've also looked at various tools like sound covers and the blimp and wasn't impressed.
What do you guys suggest for a classical music performance in a tight space?