Transylvanian Dance Lucian Ban, piano Mat Maneri, viola ECM Records   “These folk songs teach us many things.”   Transylvanian Dance is the second recording on ECM by pianist Lucian Ban and violist Mat Maneri; the first was Transylvanian Concert (2013). As the album title suggests,  the duo explores Eastern European material, specifically that collected by Béla Bartók. Ban was born in Romania and delights in the fascinating polyrhythms of this region. Maneri is well versed in the microtonal and multi-scalar aspects of folk song. These are not mere transcriptions. Maneri has described them in interviews as, “a springboard,” a