As we approach the psalms, we should keep in mind that we are dealing with poetry, not theological prose, or even storytelling.
103. The psalms are not readings or prose prayers, but poems of praise. They can on occasion be recited as readings, but from their literary genre they are properly called Tehillim (“songs of praise”) in Hebrew and psalmoi (“songs to be sung to the lyre”) in Greek. In fact, all the psalms have a musical quality that determines their correct style of delivery. Thus even when a psalm is recited and not sung or is said silently in private, its musical character should govern its use. A psalm does present a text to the minds of the people, but its aim is to move the heart of those singing it or listening to it and also of those accompanying it “on the lyre and harp.”
Does this musical quality extend to the instruments used to accompany it? Are plucked strings ideal above pipes, being the original intended accompaniment?