Contradiction with Psalm 150:4
2 Chronicles 20:28 mentions using various instruments in worship, like harps and trumpets, expressing joy, whereas Psalm 150:4 also encourages worship with instruments but doesn't mention the context of a procession, as in 2 Chronicles 20:28.
Psalm 150:4: Praise him with the timbrel and dance: praise him with stringed instruments and organs. [dance: or, pipe]
Contradiction with Amos 5:23
2 Chronicles 20:28 describes using music as part of worship, but Amos 5:23 presents a contrast by rejecting the noise of songs and instruments, indicating that God may at times refuse such forms of worship if not accompanied by righteousness.
Amos 5:23: Take thou away from me the noise of thy songs; for I will not hear the melody of thy viols.
Contradiction with Isaiah 1:13-14
2 Chronicles 20:28 portrays music and offerings as part of worship, while Isaiah 1:13-14 indicates that such rituals are meaningless if not coupled with true justice and sincerity.
Isaiah 1:13-14: Bring no more vain oblations; incense is an abomination unto me; the new moons and sabbaths, the calling of assemblies, I cannot away with; [it is] iniquity, even the solemn meeting. [iniquity: or, grief]