Tune in tonight at 7 for a concert of works by Ravel, Tchaikovsky, Respighi, and the young British composer Thomas Ades that were inspired by the 18th century. Ravel's "Le Tombeau de Couperin" pays tribute to the French Baroque; one of the greats of that era, Francois Couperin, inspired Ades' "Three Couperin Sketches." Respighi's "The Birds" is his arrangement of music by several 18th-century composers, and Tchaikovsky's "Variations on a Rococo Theme" explore a theme he wrote to honor that century's music. Jeffrey Kahane conducts the Los Angeles Chamber Orchestra, and Ralph Kirshbaum is the cello soloist in the Tchaikovsky.