Something Protestant FReepers may not appreciate is that there is no “Catholic hymnal”, there are a dozen or more in US alone, because they are all printed by private groups or companies. They range all the way from some fairly slavish copies of parts of old Protestant hymnals (e.g., the 1940 Episcopal hymnal) with Catholic bits added (the “Vatican II hymnal”) to awful collections of 1960’s fluff (most anything from Oregon Catholic Press).
Is that why OCP loves Marty Haugen?