Rounding out his Reveries and Passions concerts with the CSO, guest conductor Esa-Pekka Salonen will lead a program May 21-23 headlined by Messiaen’s tour de force, the Turangalîla-symphonie, featuring pianist Jean-Yves Thibaudet. Like his teenage love for Debussy’s opera Pelléas et Mélisande, Salonen has treasured Turangalîla since his early years. “I came home from school one day, and Turangalîla was playing on the radio, and it really hit me like a hammer,” he recalls in this video interview. “I thought, ‘If music can sound like this, I want to be a composer.’ ”