Contradiction with 1 Samuel 16:23
Implies only David played the harp, whereas 1 Chronicles 25:6 refers to multiple musicians directed by David.
1 Samuel 16:23: And it came to pass, when the [evil] spirit from God was upon Saul, that David took an harp, and played with his hand: so Saul was refreshed, and was well, and the evil spirit departed from him.
Contradiction with 1 Samuel 13:14
States David is a man after God's own heart, suggesting his unique service, while 1 Chronicles 25:6 speaks of a collective service by David's sons.
1 Samuel 13:14: But now thy kingdom shall not continue: the LORD hath sought him a man after his own heart, and the LORD hath commanded him [to be] captain over his people, because thou hast not kept [that] which the LORD commanded thee.
Contradiction with 2 Samuel 6:5
Describes David with all Israel playing instruments, possibly contradicting the specific roles and order in 1 Chronicles 25:6.
2 Samuel 6:5: And David and all the house of Israel played before the LORD on all manner of [instruments made of] fir wood, even on harps, and on psalteries, and on timbrels, and on cornets, and on cymbals.
Contradiction with Psalm 150:3-5
Encourages all to use various instruments, which may contradict the exclusive musical service in 1 Chronicles 25:6.
Psalm 150:3-5: Praise him with the sound of the trumpet: praise him with the psaltery and harp. [trumpet: or, cornet]