Don't you think you should move into the New Testament to find the verses for proper worship in the church? The church was established after the death of Jesus Christ at which time the "imperfect" Old Law was done away with. You won't find one verse about worshipping God with instruments of music in the Lord's church.
Galatians 3:24-25,“Wherefore the law was our schoolmaster to bring us unto Christ, that we might be justified by faith. But after that faith is come, we are no longer under a schoolmaster.”
You must be from the Church-Of-Christ denomination. There are a lot of Biblical things they do not see, that the Bible says for us to do.
God approves of musical instruments in the church.
b1. Instruments are approved by God elsewhere in the New Testament (Revelation)
b2. Instruments are not condemned in the early church
b3. Therefore, instruments are approved by God in the early church
b1. Instruments are approved by God elsewhere in the New Testament (Revelation).
When He had taken the book, the four living creatures and the twenty-four elders fell down before the Lamb, each one holding a harp and golden bowls full of incense, which are the prayers of the saints.(Revelation 5:8)
And I saw something like a sea of glass mixed with fire, and those who had been victorious over the beast and his image and the number of his name, standing on the sea of glass, holding harps of God.(Revelation 15:2)
In these passages we see use of musical instruments in Heaven. The fact that there are musical instruments described in Heaven, symbolic or otherwise, means that God approves of musical instruments since there cannot logically be anything in Heaven unapproved by God.
b2. Instruments are not condemned in the early church.
b3. From this we may conclude that because God approves of musical instruments, He approves instruments in the early church. This would be different if God specifically told the church not to play instruments, but this is not the case.
From these two arguments, I think I have shown that mechanical instruments of music are approved by God in the New Testament church.