Michala Petri, the First Lady of the Recorder, invited four American composers to make their own discovery of just what an Old World Recorder can do. For the newest installment of her ground-breaking Concerto Project, four works have been specially commissioned to showcase the sound of the modern recorder, including the late Steven Stucky’s thoroughly contemporary “Etudes,” Roberto Sierra’s Latin-tinged “Prelude,” “Habanera” and “Perpetual Motion,” Harpsichord virtuoso Antony Newman’s “Neo-Baroque Concerto for Recorder, Harpsichord & Strings,” and Sean Hickey’s boldly-wrought “A Pacifying Weapon.”