Yes, so instruments are an offering above and beyond the simple command, as our actions are not done simply to satisfy commands, but to express our faith, love, joy, and hope that Christ has given us, by praising His Name.
Are we called to do the bare minimum of the commands? That's legalism at it's worst.
With the way you are talking, this is not an issue of commands and breaking commands and of authority, but a heart issue. Is this a Living Hope and a Joy Unspeakable, or dry dead set of commands, mandates, and allowances?
You claim to have taken off the yoke of the OC, yet you put on a yoke of the same power and weight, rather than the yoke of Christ, which is greater in power, and easy and light. The message you have is the SAME as the OC! There is nothing New about the Covenant you preach, except for replacing some old rules with new ones. I am saying this not just out of this one post, but from the many posts you have written on varied subjects, as they all come back to the same spiritual death.
Set your eyes back on the Cross, and set your heart upon your first love.