O vos omnes - Pablo Casals - YouTube // Gondwana Chorale performs "O vos omnes" by Pablo Casals. This piece is conducted by Paul Holley. Gondwana Chorale is an Australian choir that consists of singers from around the country aged 17-25. This concert is filmed at Verbrugghen Hall at the Conservatorium of Music in Sydney. This concert is the culmination of a two week National Choral School which includes Gondwana's other choirs.