The Church knew what the psalmist knew: Music praises God. Music is well or better able to praise him than the building of the church and all its decoration; it is the Church's greatest ornament.
I remember being handed a score composed by Mozart at the age of eleven. What could I say? I felt like de Kooning, who was asked to comment on a certain abstract painting, and answered in the negative. He was then told it was the work of a celebrated monkey. 'That's different. For a monkey, it's terrific'.
It is the transcendent (or 'abstract' or 'self-contained') nature of music that the new so called concretism--Pop Art, eighteen-hour slices-of-reality films, musique concrete--opposes. But instead of bringing art and reality closer together, the new movement merely thins out the distinction.