This (the history of our musical worship) is an interesting history.The first Baptists sang only Psalms, but they put them to metre so that the congregations could sing them.
Initially worship music was joyous, emotional and energetic. This type of music lacked the harmony our music uses as a structure (the music was monophonic and unharmonized).
Our worship music became solemn (what we hear as "sacred") in the Midfle Ages through the Catholic Church. And it was not until the 9th century that harmony began to appear in Western music.
But our early humns were psalms or passages. When what we consider to be traditional hymns began to appear it met a lot of resistance.
Puritians rejected the use of hymns. Instead they sung psalms. The rationale was worship should only be the psalms as written in Scripture and hymns were man-made rather than God delivered.
Several Presbyterian sects condemed the use of hymns, as did John Calvin. They viewed hymns as a rejection of God in favor of human invention.
That theology (that view in regard to worship music) gave way to the use of hymns.
Today we see traditional hymns giving way to Contemporary Worship Music. In a way, CWM is a return towards the past (many dong lyrics are more biblical and less subjective than our traditional hymns). But the accompanying music shares hymn's use of harmony, but with a different style.
These changes have taken place as long as Christianity has spread outside of its beginning environment.
