Composer Meredith Monk being interviewed during the 'American Mavericks' event at The Greene Space, New York City, on March 26, 2012. Matthew Septimus/courtesy of New York Public Radio hide caption

itoggle caption Matthew Septimus/courtesy of New York Public Radio

Projections on the giant sails of the Sydney Opera House, which served as the venue for the YouTube Symphony Orchestra concert. Chris Phillips/YouTube hide caption

itoggle caption Chris Phillips/YouTube