What has music during church services have to do with the Trinity?
Ps 33:2-3
2 Give thanks to the LORD with the lyre;
Sing praises to Him with a harp of ten strings.
3 Sing to Him a new song;
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Zech 2:9-13
10 "Sing for joy and be glad, O daughter of Zion; for behold I am coming and I will dwell in your midst," declares the LORD. 11 "And many nations will join themselves to the LORD in that day and will become My people. Then I will dwell in your midst, and you will know that the LORD of hosts has sent Me to you. 12 "And the LORD will possess Judah as His portion in the holy land, and will again choose Jerusalem. 13 "Be silent, all flesh, before the LORD; for He is aroused from His holy habitation."
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Rom 15:9
"Therefore I will give praise to Thee among the Gentiles,
And I will sing to Thy name."
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Rev 5:9-10
9 And they sang a new song, saying,
"Worthy art Thou to take the book, and to break its seals; for Thou wast slain, and didst purchase for God with Thy blood men from every tribe and tongue and people and nation.
10 "And Thou hast made them to be a kingdom and priests to our God; and they will reign upon the earth." NAS
Many of the Psalms contain instuctions as to what musical instrument are to accomply the singing.
Does that answer your question?