"Talking during performances, singing aloud - except where sanctioned - unwrapping candy and cough drops" were equally likely to cause annoyance, he said.

BBC: New York bans mobiles in theatres

During the performances, there'll be a musician onstage with an acoustic guitar singing and playing along with pre-recorded tracks made by the Barenaked Ladies.

NPR: Barenaked Ladies Meet Shakespeare

During performances, the singers stand in a tight semicircle, and the first tenor starts the singing, followed by the others.

UNESCO: MEDIA SERVICES