I was on an interview on a radio show this week, and I was struck how the debate over music at Mass rarely gets beyond what hymns we should be singing. People will fight over this subject for hours. But there is a sense in which this whole debate misses the point. We should not be arguing about which kind of devotional music to sing. We should be singing the liturgy itself. The Graduale Romanum is the source text for the ordinary and extraordinary form. But that can be too much for starting parishes. This is why we have these new resources that make singing the Mass possible for every parish.
Parish Book of Psalms
Simple English Propers