BCMF Spring, the Bridgehampton Chamber Music Festival’s new spring series, presents one of the great quartets performing today: the Miró stand out for their vibrant playing style and deeply musical interpretations. Their program includes Haydn’s famous “Fifths” quartet, whose masterly invention is as alive today as when it was written in 1796, Copland’s charming Rondino, a miniature study in counterpoint and jazzy rhythms, and Schubert’s monumental G major quartet, one of the most majestic statements ever to be penned for string quartet.