From its mysterious opening movement to its triumphant “Ode to Joy,” Beethoven’s Ninth Symphony changed the course of music and remains one of its most recognizable landmarks. Tonight, the storied Orchestra of St. Luke’s performs the masterwork with choir and soloists under conductor Raphaël Pichon, who recently led a sold-out performance in Boston’s Symphony Hall, revealing that “the Ninth can still be a source of evergreen freshness and vitality” (The Boston Musical Intelligencer). Boston Classical Review agreed: “Pichon finds fresh illumination in Beethoven’s Ninth … it thundered.” The concert also features the Carnegie Hall premiere of selections from Beethoven’s incidental music for a never-performed play: Leonore Prohaska.