To chart the territory of Zion Roots, the new collaboration between ?ber-underground world fusionist Bill Laswell and Ethiopian singer Ejigayehu Gigi” Shibabaw, start with the voice. Gigi’s vocals bubble and gush like water through a sparse, stony creek bed, meandering around reedy percussion arrangements, slithering accordion riffs and lone bamboo flutes. Her music journeys from the shores of the ancient Nile to the metropolitan future of Laswell’s New York by way of 10 heart-rending songs that blend Amharic liturgical and folk sounds with the occasional organic 4/4 house rhythm. What to say about Gigi’s Roots? Let it flow.