What is this a function of? In 25:1-3 we have 3 references to these levitical worship leaders prophesying and 3 references of them doing so under royal supervision (David directing Asaph and his sons, who direct the sons of Heman and Jeduthun, who, in turn, direct the worship leaders—cf 25:6). This is important to note, because we see the freedom of prophetic inspiration working harmoniously under the structure of strong authority. It can be done in God’s economy.
One of the five functions carried out by the Levitical prophetic musicians that David established