In tributes to ‘Tristan,’ Salonen and CSO lack forces and focus to embrace Wagner epic

Review: Finnish conductor Esa-Pekka Salonen once undertook total immersion in the music of Richard Wagner’s “Tristan and Isolde,” an opera of lasting influence and extraordinary musical language, newly coined to express ecstatic, forbidden love and its all-consuming anguish. Today Salonen’s enthusiasm for exploring this operatic icon is undiminished. In addition to two concert performances with the Chicago Symphony Orchestra of “Tristan’s” mesmerizing second act, he led “Beyond the Score” performances that explored the controversy over Wagner’s musical nugget, the Tristan chord, and its breakthrough potential to lead the ear beyond traditional harmonic bounds. Neither effort proved entirely successful. Through Feb. 24.