Singer/songwriter and arranger, Demetrio is the principal contributor to the Modern Chantry music collection. Based in Calgary, Canada, he has arranged or co-written music for dozens of local artists including Yoko Galvin, Scott Kelly, and Rob Zimmerman. As band leader for The Inspirition Band at St. Michael's Catholic Community in Calgary, he began writing new songs for the Responsorial Psalms part of Mass when he wasn't satisfied with what had already been written. He has since written a song for each psalm in the liturgical cycle. Similarly, he found that new music about Mary was needed, which had not seemed to have progressed significantly since the traditional songs of Mary were written (mostly in the 70's). It was from these requirements and the desire to share his musical ideas in Mass that he built the Modern Chantry site.