Second Isaiah has this chant of joy. The heavens were to sing about what Yahweh has done. The depths of the earth should shout. The mountains and the forests, with all its trees, should break into singing. Yahweh has redeemed Jacob so that he should be glorified in Israel.
David’s head was lifted above all his enemies who were all around him. He was going to offer sacrifices in the tent or Temple of Yahweh. He was going to sing and make melody to Yahweh. However, the problem was that only the Levites and priests could make the sacrifices in the Temple. David was not a Levite.