Take away from me the noise of your songs! I will not listen to the music of your harps.
Keil did not proceed from this with any kind of argument, except by leaving off any condemnation of the practice as observed in Christianity. The passages cited do indeed indicate that David placed instruments of music in the temple worship, which is undeniable; but what is inferred is that this was authorized by the Lord.  David was guilty of many gross sins, not merely in the moral sector, as in the case of the wife of Uriah, but also in the very conception that led to the erection of the Jewish temple, a thing that God never authorized, and which was manifestly contrary to the will of God from the very moment when David dreamed up the idea.  See  2 Samuel 7:1-17, where David's error in proposing a temple is clearly set forth.  It is a great mistake to suppose that whatever David did was the will of God.