“Andris Nelsons opens the new BSO season with A Toast!, which John Williams originally wrote in 2014 to welcome Nelsons to the BSO. American pianist Awadagin Pratt, making his BSO debut, performs a work written for him, American composer Jessie Montgomery’s Rounds, and J.S. Bach’s Concerto in A. English composer Gustav Holst’s orchestral showpiece The Planets ranges from Venus’ sweet lyricism to Mars’ propulsive energy.”