The Indeterminacy Festival will present the world premiere of “Directions for Making a Round Ark.” The new chamber opera, by Stanzi Vaubel & Philippe Treuille, retells a Babylonian flood myth predating the biblical story of Noah’s Ark by a thousand years, unfolds in three parts, and features three soloists joined by an intergenerational consortium of over 70 Brooklyn-based choral singers {…}