The American Federation of Musicians bitterly opposes devices such as Realtime Music Solutions' Sinfonia, called a "virtual orchestra" by musicians. The union has insisted on clauses banning the device in several contracts recently signed with New York ensembles.
"The Kennedy Center, by agreeing to never use the Virtual Orchestra Machine, has demonstrated its commitment to live music," union president Tom Prince said in a statement.
According to the Washington Post, the new contract also maintains the current arrangement in which Kennedy Center musicians and New York City Ballet musicians alternate in accompanying NYCB during its Washington visits.
The contract covers the Opera House Orchestra's performances for ballet and musical theater performances. The orchestra has a separate contract with Washington National Opera.