In the O.T. we find there were courses of singers, and there were some who were 'taught to sing praise.' Instruments were also appointed for the singers. 1Ki 10:12. In Hab 3:19, at the end of the prophet's poetical 'prayer,' it says, "To the chief singer on my stringed instruments." "The singers went before, the players on instruments followed after; among them were the damsels playing with timbrels." Ps 68:25.
Such organised choirs have no place in the N.T. They that worship God "must worship him in spirit and in truth." This also applies to the singing: "I will sing with the spirit, and I will sing with the understanding also." 1Co 14:15: cf. 1Co 14:26. "Be filled with the Spirit, speaking to yourselves in psalms and hymns and spiritual songs, singing and making melody or chanting in your heart to the Lord." Eph 5:19. "In psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord." Col 3:16. There will be singing in heaven. Re 5:9. Singing and PRAISE naturally go together. At the institution of the Lord's supper they 'sang a hymn,' margin 'psalm,' ?????. Mt 26:30. The same word is translated 'sang praises' unto God, when Paul and Silas were in prison, Ac 16:25; and the Lord sings praise in the midst of the assembly. Ps 22:22; Heb 2:12.