After four weeks of a lockout with no negotiations, the management and the musicians of the Atlanta Symphony Orchestra have agreed to federal mediation. The U.S. Federal Mediation and Conciliation Service (FMCS) announced Friday that it will provide mediation services to both sides starting next week. “In response to a joint request from the parties, the FMCS will provide mediation to the orchestra musicians and management with the goal of helping them reach a mutually acceptable resolution to the issues that divide them,” the agency said in a statement.