The closing song is not part of the Mass. Remember the priest has said that the Mass is ended and we gave thanks and praise to God. It has however become customary in many churches, including ours, to have a closing hymn. Music in Catholic Worship says, “the recessional song has never been an official part of the rite; hence musicians are free to plan music which provides an appropriate closing to the liturgy.” [MCW #73] There may be times when the musicians play an instrumental piece or even, on occasion, choose not to use music at all and simply close the liturgy with silent prayer. Be assured that any musical decisions are made with prayerful consideration to uphold the integrity of the liturgy.