The Pittsburgh Ballet Theatre’s decision to drop its live orchestra in favor of canned music for the upcoming season has been greeted with dismay from all sides. Musicians, dancers, and subscribers alike agree that the move will cheapen the company’s performances, and PBT officials can only say that they believe the move was an absolute last resort to keep the troupe within its $6.4 million budget. All sides are leaving the door open to the orchestra’s return, even for only a part of the 2005-06 season, if a late infusion of cash can be found.