The Philadelphia Orchestra’s contract with its musicians doesn’t expire for another year, but the orchestra’s board chairman wants to reopen negotiations immediately, and to get a new labor deal in place before the start of the season later this month. According to chairman Richard Smoot, the orchestra is pursuing some massive financial gifts, but donors are only willing to lay their money on the line if the organization can bring its financial situation under control. Among the management proposals being floated are plans to reduce the size of the orchestra through attrition, to replace unionized substitute players with students, and to delay scheduled raises for the musicians by a year.