MAHLER’S GORDIAN KNOT OF A CANTATA
SAN FRANCISCO—The young Gustav Mahler undertook painting a huge canvas in his cantata “Das klagende Lied,” a rich hour-long piece undertaken even though he’d never heard a note of his own orchestration. This weighty vocal-orchestral opus unfurls a somber fairy tale in German—not Grimm, but at least grim—that got an even greater production from the San Francisco Symphony, which added sets, costumes in a lavish but stillborn near-operatic staging. This flickering creation is an obsession of Music Director Michael Tilson…