Two long-time collaborators, cellist Francesa Ter-Berg and violinist Flora Curazon, Fran & Flora, have bonded over their obsession with ancient music, rooted in Eastern European and Jewish culture, for over a dozen years. Together and separately, the English musicians have been studying with teachers of ethnomusicology in places like Transylvania and Romania. There, they took in the music as well as the cultural influences. That’s not to speak of their higher musical education, Francesca holds two masters in music (including…