Unitas Chorale Annual Concert, Psalms, Hymns, and Spiritual Songs. Sunday, April 29, 2018 at 4:00 pm, Emmaus Moravian Church, Emmaus, PA. The Unitas Chorale is the Northern Province performing arm of the Moravian Music Foundation. Gwyneth Michel, Director Donna Ambler, Accompanist Visit www.dev.thesignalcompany.com/foundation for information. See also Facebook for details.