Contradiction with Ecclesiastes 3:4
Suggests there is a time to refrain from singing as it mentions there is a time for mourning.
Ecclesiastes 3:4: A time to weep, and a time to laugh; a time to mourn, and a time to dance;
Contradiction with Amos 5:23
Implies that God may reject songs and praises if they're not offered with true justice and 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
Indicates that God is displeased with offerings and assemblies when they are hypocritical, suggesting that song alone isn't pleasing.
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]
Contradiction with Haggai 2:14
Suggests that despite offerings, if people are defiled, what they present, including songs, are unacceptable.
Haggai 2:14: Then answered Haggai, and said, So [is] this people, and so [is] this nation before me, saith the LORD; and so [is] every work of their hands; and that which they offer there [is] unclean.
Contradiction with Matthew 15:8-9
Indicates that worship in vain is possible if done only with lips and not the heart, contrasting the call to sing praise.
Matthew 15:8-9: This people draweth nigh unto me with their mouth, and honoureth me with [their] lips; but their heart is far from me.
Contradiction with Amos 6:5
Criticizes those who invent songs to indulge, implying such acts might not be reverent as called in Psalms.
Amos 6:5: That chant to the sound of the viol, [and] invent to themselves instruments of musick, like David; [chant: or, quaver]