A "schizophrenic throat," as described by Michael Feinstein, didn't keep the consummate performer from delivering a stunning tribute to Frank Sinatra in front of a packed audience. With the Indianapolis Symphony Orchestra players, conducted by Jack Everly, and his combo, Feinstein traversed eras of vintage Sinatra, including two encores Feb. 15. "Sinatra was the greatest singer of his century. He changed with the times and adapted and sang the best songs of the century." Feinstein's anecdotal introductions placed Sinatra and the songs within the context of personal reminiscences and research. "Frank Sinatra loved pianists," Feinstein explained. "He commissioned pieces for them." With the orchestra, Feinstein charmed with his take on "Brazil," a swinging panoramic piano composition. Broadway, film and big band scores swelled from the ISO for the first hour.