Does music and intercession establish the kingdom or the kingdom establish music and intercession? What comes first? Is one the effect of the other, or can one happen without the other?
The Tent of David being rebuilt is international. When God opened the door of the kingdom to non-Jews, the prophetic fulfillment identified a greater scope for kingdom expansion and establishing.
The key of David would, by necessity, require more than music, and assuming that it is exclusively or predominately musical in nature because David was musical would ignore the heart of David that attracted God. “God found David because He was looking for someone to finish what God asked him to do.”
The Tent of David speaks more about finishing what God assigned David, a quest for international kingdom expansion and establishing Jesus arrived to make eternal and guarantee fully successful.