The young Scandinavians of the Eka Trio combine the relaxed sensuosity of trends in Nordic music with their underlying commitment to the adventurousness that goes to the heart of jazz. In the album that they call “O,” the trio and two guest artists craft a collection of fourteen pieces that thrive on certain major-minor key relationships often found in music of Sweden, Norway and Finland, as well as on interaction among guitarist Tomas Hornberg, bassist Anne Marte Eggen and drummer Pontus Haggblom. In addition, saxophonist Karolina Almgren and trombonist Goran Abelli provide lyrical moments and, in Abelli’s case, grit that intensifies the musical pallete. It is a delightful…and frequently surprising…album.