Before the release of their new disc, Colombia’s Bomba Estereo generated plenty of excitement on these shores courtesy of an appearance on NPR’s “Alt. Latino” show. “Elegancia Tropical” continues its cultural collision mode. Lead vocalist Lilana Saumet’s sensual sound is buttressed by driving backdrops that mix and match African and Latin beats with rock and electronic melodies and textures. Guitarist Julian Salazar brings a swashbuckling attitude to his solos and accompaniment, while the group’s idiomatic penchant extends beyond cumbia into Afro-Caribbean and Brazilian territory. “Mozo” and “Rocas” are gritty, emphatic tunes, while “El Alma y El Cuerpo” samples ’70s funk, and “Pa Respirar” takes them into more introspective, ambient frameworks. Still, Bomba Estereo is at its best when energized, and that’s the direction the best pieces on “Elegancia Tropical” take. These are intense, engaging tunes that reference Colombia’s – indeed all Latin America’s – foundation sounds, while simultaneously beckoning to the present and future.