The ensemble was set up especially for the performance of Ralph Vaughan Williams’s opera Riders to the Sea. It is composed of 12 female vocalists of the Warsaw Philharmonic Choir: six sopranos – Katarzyna Bienias, Magdalena Dobrowolska, Inga Poškutė, Magdalena Schabowska, Sylwia Sikorska and Barbara Szczerbaczewicz, and six altos: Jadwiga Bartnik, Anna Fijałkowska, Joanna Gontarz, Jolanta Kaczyńska-Lechnio, Anna Stawarz-Moszczyńska, and Izabella Szajnwald.