What if you couldn’t understand the Reader at Mass? What if today’s readings sounded a bit like this:
Someone is sitting at the back of the church, the room is echoey, and bodies with clothes on them are eating up the sound. Already too softly pronounced consonants are now being put on the missing letters list on the back of milk cartons. I would fully expect that the Reader be counseled to start enunciating and pronunciation more articulately even if it feels and sounds odd to him, because the important thing is that the words are both heard and understood or else stop reading or having Scripture at Mass. Ministries are not charitable activities we give to people to be nice. You must have the ability to do them and do them well for the benefit of the people in attendance because if it doesn’t matter, why do it in the first place? The stakes are just too profound.
So why do we allow it with music? Music is Scripture, Scripturally based, and deals with important matters of faith. It is vital that its message is clear and understood (even if it is in Latin!) or why do it? Then it just becomes very beautiful (hopefully) background noise. And sometimes beautiful background noise is called for. But unless you intend that, why not make sure every work you sing is enunciated with distinction? It may be that a particular phrase moves a heart and soul toward the Lord in a way that the homily didn’t or can’t.