The Cleveland Orchestra performs a pair of Russian symphonic masterpieces, starting with the folkloric magic of Stravinsky’s Pétrouchka. The whimsical piece stands in great tonal contrast to Tchaikovsky’s final composition, Symphony No. 6. Though immortalized in the West with its French translation, “Pathétique,” Tchaikovsky’s chosen subtitle, “Pateticheskaya,” announces it as something closer in meaning to “Passionate Symphony.” He called it both the “most sincere” and “best thing I ever composed.”