Jordi Savall and Juilliard415

The Catalonian monarch of the gamba sits in with the school’s élite period-performance group, performing in a concert that explores the pervasive French influence on the Baroque style—works by Muffat, Bach (the Fourth Orchestral Suite), Handel (excerpts from “The Water Music”), and Rameau (orchestral music from “Les Boréades”). (Peter Jay Sharp Theatre, 155 W. 65th St. Oct. 15 at 8. Free tickets are available at the box office.) (Peter Jay Sharp Theatre; Oct. 15-Oct. 15.)