Many of the texts of the sacraments are not yet set to music. The appendix to the rite of infant baptism has sets of acclamations, hymns, and troparia that have received scant attention from composers. Confirmation and marriage have introits and communions that remain unset, not to mention offertories based on those in the gradualia. Candidacy and the ordinations of deacons, presbyters, and bishops have unset ritual texts, as do the institutions to reader and acolyte. The dedications of churches and altars are similarly neglected. And then there are the yet-to-be realized opportunities for songs of praise after communion, to be sung by all, of course.
Can others suggest other unmet musical needs?