MacPhail’s premier adult choral ensemble, Sonomento, is an award-winning choral ensemble that provides an intensive, quality choral experience for those seeking the challenge and fulfillment of singing classical choral music. The choir performs major works from the traditional choral canon, including oratorios, cantatas, opera-in-concert and new works. The musical director, Craig Fields, follows the ‘Westminster Choir Method’ of choral singing, encouraging singers to produce a full-voiced tone and to continually develop their individual singing voice.

The ensemble often collaborates with local orchestras and other choral ensembles in the region. In 2015, the group toured central Europe and was awarded two silver medals at the International Brahms Choral Festival in Wernigerode, Germany. The group toured the British Isles and participated in the International Eisteddfod Festival in Wales in July 2018.