Psalm 96:1 calls all the earth to sing to the LORD what kind of song?

Answer: A new song

Psalm 96:1: "Sing to the LORD a new song; sing to the LORD, all the earth." Psalms 33:3, 98:1 and 149:1 also call for a new song.

“Sing to the LORD a new song; sing to the LORD, all the earth.”— Psalm 96:1 (BSB)