Sacred Heart Preparatory School’s a cappella quartet, Pulse, will present Jason Robert Brown’s “Songs for a New World” at 7:30 p.m., Saturday, and 2 p.m., Sunday, at the Campbell Center for the Performing Arts at the school, 150 Valparaiso Ave., Atherton. Pulse is composed of Los Altos seniors Emily Borromeo, alto; Nic Rouleau, tenor; and Nicole Villeneuve, soprano; and Sean Kranz, bass-baritone, of Atherton. Tickets are $8 for adults; $5 for students and the school faculty. To order tickets, call 968-6480.