The unmistakably jarring sound of an iPhone marimba ring interrupted the soft and spiritual final measures of Mahler’s Symphony No. 9 at the New York Philharmonic on Tuesday night. The conductor, Alan Gilbert, did something almost unheard-of in a concert hall: He stopped the performance. But the ringing kept on going, prompting increasingly angry shouts in the audience directed at the malefactor.
You always have to switch off iPhones.
