Joshua Kosman February 16, 2021Updated: February 16, 2021, 7:46 pm Bang on a Can founding artistic directors David Lang (left), Michael Gordon and Julia Wolfe. Photo: Peter Serling Something possibly worth noting about the influential New York new-music behemoth Bang on a Can is that the name is, strictly speaking, a misnomer. There aren’t any cans, and there’s only a reasonable amount of banging. Yet the name, which evolved out of a throwaway joke in an early grant application, does get at a distinctive aspect of this organization. Since its inception in 1987, Bang and its founding artistic directors — composers Julia Wolfe, Michael Gordon and David Lang — have been hammering away at many of the artistic, economic and social structures underlying the world of contemporary classical music.