SSATB choir divisi unaccompanied - Digital Download SKU: OX.9780193524996 Composed by Cecilia McDowall. Sheet music. New Horizons. Octavo. 8 pages. Duration 3.5'. Oxford University Press Digital #9780193524996. Published by Oxford University Press Digital (OX.9780193524996). ISBN 9780193524996.For SSATB choir (with divisions) unaccompanied A setting of one of the seven Advent 'O' Antiphons, O Oriens makes use of luxurious and exotic harmonies, creating a shimmering texture. The focus on human enlightenment in winter's darkness means the piece is equally suitable for secular celebrations of Christmas.