https://youtu.be/ehswmosIEp4
Psalm 96
1. Sing to the LORD a new song; sing to the LORD, all the earth.
2. Sing to the LORD, praise his name; proclaim his salvation day after day.
3Declare his glory among the nations, his marvelous deeds among all peoples.
4For great is the LORD and most worthy of praise; he is to be feared above all gods.
5For all the gods of the nations are idols, but the LORD made the heavens.
James 5:13 (NIV): "Is any one of you in trouble? He should pray. Is anyone happy? Let him sing songs of praise."

There are two parts to the command to sing. First we are told to “speak to one another” with songs. The audience there is one another. Our singing is a way to communicate with one another in the body of Christ. These hymns are one way we build one another up, by speaking to one another in song. We are teaching one another about God, reminding one another of the gospel, driving the truths of the gospel deep into the hearts of every member of the body. 
Singing is a very important factor in the Christian fold. We should always engage in it as often as possible.