James Levine and the Metropolitan Opera Orchestra finish up their Carnegie season on a down note. Why? “It’s futile to speculate on whether any of this reflects the effects of recent public discussion of long-standing concerns about unexplained tremors in Mr. Levine’s left arm and leg and whether tension was created in the orchestra by its members’ willingness to voice their doubts in The New York Times in an article on May 1. The only effect one can state with certainty is the huge outpouring of love and support from the audience every time Mr. Levine conducts. The only reason to raise the issue is that one wants to find a reason for the poor quality beyond simple fatigue at the end of a long season.”