Yes, of course.
But, when people pointed you to Psalms 149 and 150, which specifically mention playing musical instruments in praising God, you responded by saying the OT is not binding for Christians. How you relate the OT Law to the Psalms remains unclear to me. No one was saying those Psalms commanded the playing of instruments. Are you?
At any rate, it seems what you're saying is, although it used to be good to praise the Lord in the playing of musical instruments, something about the New Covenant has made musical instruments unacceptable, or even bad, for praise and/or worship. Correct?
In the New Testament, we have been commanded to sing (Eph. 5:19, Colossians 3:16). It is a specific command. There is no implication in this command about mechanical instruments. In every example we have of Christians praising God within the New Testament, it is by singing.