Atlanta and Chicago Orchestras Settle Labor Disputes The musicians of the Atlanta Symphony Orchestra and their management have reached agreement on a two-year contract, and the board of the Chicago Symphony Orchestra has signed off on a new pact, already ratified by the orchestra, ending two labor disputes in the classical music world. The Atlanta players had been locked out, but orchestra officials announced Wednesday night that an accord had been reached and that the season would start as scheduled on Oct. 4. In Chicago the orchestra said the musicians would receive raises amounting to 4.5 percent over three years and pay more for health insurance. Labor trouble is still simmering at the Minnesota Orchestra and St. Paul Chamber Ensemble.