***You will find animal sacrifices in the Old Testament also. Different time, different covenant.***
The validity of animal sacrifices ceased at the cross. They were still being performed for a time afterward. St Paul was told to offer one in the Temple by James.
I’m not arguing with that. Just pointing out the rationale for a Christian finding his/her belief and practice in the New Testament rather than the Old. One does not find teaching or example in the NT for using musical instruments. That is why there is no example in history for any Christians using instruments until about 600 yrs after the beginning of the church. Most churches of Christ sing “acapella” which loosly translates “in the style of the church or chapel.”