Take the potency of an amplified edgy rock band and crank up the intensity, then throw in musical improvisation, and that describes New York’s most daring string quartet sensation, ETHEL. Creating a world in which classical music has never grown distant, ETHEL finds common ground between complex experimentalism and folk-influenced Americana. The inventive string quartet is setting the standard for new music engagement. ETHEL is touring with a program entitled “Grace,” the centerpiece of which is ETHEL’s adaptation of Ennio Morricone’s score to the 1986 film, The Mission, which addresses cross-cultural complexities fueled by the quest for redemption against the backdrop of the jungles of South America.