The first sacred music on record is found in Job 38:7, where the morning stars sang together at the creation of the material universe.
The earliest recorded singing by men appears in Ex. 15:1, when the people of Israel rejoiced over their salvation from Egypt.
A number of remarkable facts are revealed concerning sacred music. It brings refreshment, and drives away evil spirits, 1 Sam. 16:23. It provides an atmosphere favorable to the ministry of the Word, 2 Ki. 3:15, 16. It helps to bring men to God, Psa. 40:1-3. It contributes to the defeat of the enemy, 2 Chr. 20:21, 22. It fills the house of God with glory, 2 Chr. 5:13, 14.
The people of Israel lost their song while in captivity because of sin, Psa. 137:1-4, but recovered it again after they were restored to the land, Ezra 3:2, 11. In the NT it is revealed that the secret of the song of the redeemed is found in the word of Christ dwelling in the heart, Col. 3:16. It is one of the results of the filling of the Holy Spirit, Eph. 5:18, 19.
The new song of heaven begins on the earth. It is praise to the Lamb for having redeemed men to God by His blood out of every kindred, tongue, people and nation, Rev. 5:9.
William Evans, The Great Doctrines of the Bible, (Chicago: Bible Institute Colportage Assoc., 1912), WORDsearch CROSS e-book, 305-306.