John Harbison's music is so ubiquitous here that you might think there was nothing more to discover. Yet until Friday, Boston had never heard "Winter's Tale," the Shakespeare-based opera he composed in the 1970s. The ever-intrepid Boston Modern Orchestra Project's concert performance took place, ironically, on the first day of spring.
Harbison created his own libretto from the play, streamlining the action and synthesizing its five acts into two, which divide neatly along emotional lines. The first act is centered on Leontes, the King of Sicily, who mistakenly suspects that his wife, Hermione, has betrayed him with his friend Polixenes. As suspicion grows into jealousy and then obsession, the music becomes increasingly complex and astringent, with new ideas following one another at a blistering pace. At the end of the act, when the king banishes his newborn daughter and is told that Hermione has died, the foundation of Leontes's world audibly falls away.