In 2008, Grinnell's Jennifer Williams Brown won a major award from the American Musicological Society for her edition of Francesco Cavalli's 1651 opera La Calisto. Want to hear a how performance sounds when it uses her discoveries? You're in luck! IPR will broadcast a recent performance from Simpson College Opera tonight (April 23) at 8 PM and again Sunday at 11 PM. Brown, who chairs Grinnell's music department and directs its Collegium Musicum, served as scholar-in-residence, dramaturg, musicologist, and coach for this production.