They make their sounds, we make ours while singing. Thus, two different actions, one of which God did not authorize. The subject deals with things correct if done or not, i.e., things not of the kingdom. The subject deals with private practice regulated by one's own conscience. But, Worship is an activity which has guidelines and specifics from God.
Worship IS a matter of the kingdom.
Worship is regulated by God, not man. They were never used by the first century church. Readers, please beware of going beyond what God has authorized by His Word. In this, we will be mutually edified, instructed, admonished, and taught as we speak to one another is psalms, hymns and spiritual songs. God will be glorified in this our worship through the avenue of song.