Orthodox churches are known for the beauty of their worship. Especially powerful, in any of their languages, is the sound. Orthodox liturgies are a tapestry of song, adorned with hymns, musical prayers, melodic responses, chanted refrains, and intoned sacred readings. Susan Ashbrook Harvey is a scholar of ancient Byzantine Christianity, both Greek and Syriac. In this presentation, she explores the historical tradition of worship as a musical weaving to which all participants – clergy, choirs, and laity – contribute with sounding voice.