Multiplicity, Compañía Nacional de Danza, directed by Nacho Duato As part of an ongoing U.S. tour, the Compañía Nacional de Danza brought its production of Bach: Multiplicity. Forms of Silence and Emptiness to the Kennedy Center Eisenhower Theater last night. As previewed earlier this week, controversial choreographer Nacho Duato drew his inspiration for the work from the life and music of Johann Sebastian Bach. The source is represented in the performance by the soundtrack…