Contradiction with 1 Corinthians 14:34
This verse advises women to keep silent in churches, whereas 2 Chronicles 5:12 describes all Levite singers, possibly including women, participating in worship.
1 Corinthians 14:34: Let your women keep silence in the churches: for it is not permitted unto them to speak; but [they are commanded] to be under obedience, as also saith the law.
Contradiction with 1 Chronicles 23:5
States that 4,000 praised the Lord with instruments made by David, which might be seen as a different number/system of music than organized worship detailed in 2 Chronicles 5:12.
1 Chronicles 23:5: Moreover four thousand [were] porters; and four thousand praised the LORD with the instruments which I made, [said David], to praise [therewith].
Contradiction with Exodus 32:17-18
Describes a scene where singing is mistaken for war, contrasting the orderly and holy nature of the music and singing in 2 Chronicles 5:12.
Exodus 32:17-18: And when Joshua heard the noise of the people as they shouted, he said unto Moses, [There is] a noise of war in the camp.