TEXARKANA, Texas -- From left, Lowell A. Davis, executive director of the St. Basil School of Gregorian Chant in Houston, and Marc-André Bougie, music director of Sacred Heart Catholic Church, lead a workshop on Gregorian chant Friday, Jan. 27, 2023, in the church's choir loft. Davis taught a seminar on the history of Gregorian chant the previous evening at Texarkana College. Some participants Friday traveled from as far away as Tyler, Texas, and Shreveport, Louisiana, to take part in the workshop. The group learned a chant titled "Lux et Origo" and then performed it during noon Mass. "It is by hearing that we believe," Lowell said, paraphrasing Romans 10:17. "Chant is one voice, one heart. You're blending all your voices because your heart is united."