There are 7,957 verses in the New Testament. As best as I can tell about 20 have something to do with singing, songs or music.
That's only .2 % (That's a decimal before the number two.)
Compare .2% with the percent of time that the average church spends worrying about music for Sunday morning.
Or how many people have left a church because of music?
I'm not even saying we should relegate music to a .2% role. There is also plenty of Old Testament scripture about singing. But in many ways the New Testament is a handbook for the church. I guess I'm just saying we shouldn't elevate music to the 50+% role that it seems to currently occupy.