Award-winning violin-piano duo, Opus Two (violinist William Terwilliger and pianist Andrew Cooperstock) presents world-premiere recordings of highlights from Stephen Sondheim’s exceptional Broadway shows in arrangements by Eric Stern, a longtime collaborator of the late composer. These include “Broadway Baby” from Follies, “Every Day a Little Death” from A Little Night Music with cellist Beth Vanderborgh, “Finishing the Hat” from Sunday …