How relevant is music in the bible?

Then David spoke to the leaders of the Levites to appoint their brethren to be the singers accompanied by instruments of music, stringed instruments, harps, and cymbals, by raising the voice with resounding joy.
I Chronicles 15:16 NKJV

David told the leaders of the Levites to appoint their fellow Levites as musicians to make a joyful sound with musical instruments: lyres, harps and cymbals.
1 Chronicles 15:16 NIV

God permited David to command musicians to use musicial instruments to make a "Joyful Sound", or in the NKJV, "by raising the voice with resounding joy".

Emotional manipulation can create an artificial experience, which potentially leads the congregation into mental idolatory (violating the 2nd commandment). But while we attempt to avoid the "golden Calf" of mordern worship, we mustn't forget that music and singing is a major part of worship recorded in the very words of God.

In Exodus 15, Moses with Israel sang a song commemodating the Lord's victory over the Egyptian army at the red sea. In Judges 5, Deborah and her commander Barak sang of how God delivered then from Jabin King of Canaan. In 1 Chro 16, David appointed Asaph to lead in a song after the Arc was brought back to Jeruselam. God delicated an entire book of Psalms as a model of music and singspiration as a form of "worth-ship" to proclaim that God is worthy above all.

In 1 Chro 25, the writers dedicated an entire chapter to list the musicians who are to minister to God in the temple. Out of which Asaph, along with his "Worship team", also "Prophesied" under the King's supervision (v1-3)

Rom 12 speaks of worship as a lifestyle of obedience. Yet music, according to a big part of scripture references, remains as an important aspect of open declaration of reverence towards a Holy God.

Music and singing was never meant to be reserved and conservative. It is meant to be a joyful response to our convictions about the God of the bible, especially to those who truly understands and believe in what they read from the bible.

Worship, with music and singing, will be a principal activity for the saints in heaven. Our expression that is birthed out of the conviction of the richness of his glory recorded in the bible, does not only begin in heaven, but here on earth.

Then I looked and heard the voice of many angels, numbering thousands upon thousands, and ten thousand times ten thousand. They encircled the throne and the living creatures and the elders. In a loud voice they were saying: “Worthy is the Lamb, who was slain, to receive power and wealth and wisdom and strength and honor and glory and praise!” Then I heard every creature in heaven and on earth and under the earth and on the sea, and all that is in them, saying: “To him who sits on the throne and to the Lamb be praise and honor and glory and power, for ever and ever!” The four living creatures said, “Amen,” and the elders fell down and WORSHIPPED.
Revelation 5:11‭-‬14 NIV