“An ensemble of musicians separated by oceans and thousands of miles will perform together later this month for the first time, having composed music layer-by-layer with sound files exchanged over the Internet. Their goal: Show how the arts can bridge diverse cultures — even among people who have never met in person before coming together on stage.” The musicians, from Afghanistan, Iran, Ethiopia, Morocco and the United States, are slated to perform in Chicago, Washington, D.C., and Casablanca.