108. Sung texts and liturgical hymns have a particular importance and efficacy. Especially on Sunday, the “Day of the Lord”, the singing of the faithful gathered for the celebration of Holy Mass, no less than the prayers, the readings and the homily, express in an authentic way the message of the Liturgy while fostering a sense of common faith and communion in charity. [Pope John Paul II, Apost. Letter Dies Domini, 31 May 1998, nn. 40, 50] If they are used widely by the faithful, they should remain relatively fixed so that confusion among the people may be avoided. Within five years from the publication of this Instruction, the Conferences of Bishops, necessarily in collaboration with the national and diocesan Commissions and with other experts, shall provide for the publication of a directory or repertory of texts intended for liturgical singing. This document shall be transmitted for the necessary recognitio to the Congregation for Divine Worship and the Discipline of the Sacraments.
Some things to like: a singing congregation preaches the liturgy as much as anything, and also reinforces the basic definition of the Church as one and holy.
Meanwhile, crickets chirp on the directory of sung texts.