Since its original publication in 1971, A Community Mass has become a staple for many parishes. Due to its wide use and inclusion in various denominational hymnals, additional material and new instrumentations were periodically created by the composer. These enrichments have made A Community Mass adaptable to a variety of circumstances and forces-from cantor, assembly, and organ to performances by choir and assembly with small or large instrumental ensembles in addition to organ. Thus an ordinary setting is transformed into a festive setting in the appropriate liturgical context. The current edition contains Proulx's own alterations for incorporating the 2010 Revised Order of Mass. Three trumpets, two horns in F, three trombones, tuba, timpani, percussion, flute and string quartet parts are optional. Percussion part includes tambourine, triangle, snare drum and cymbals.