Then he appointed some of the Levites as ministers before the ark of the LORD, to invoke, to thank, and to praise the LORD, the God of Israel.
It was a glorious day when the ark of God was safely lodged in the tent David had pitched for it. That good man had his heart much upon it, could not sleep contentedly till it was done, Psa 132:4, Psa 132:5. I. The circumstances of the ark were now, 1. Better than what they had been.
Commenting on 1 Chronicles 16:1-6
Asaph the chief,.... Of those that were now appointed: otherwise, of the three principal singers, Heman was the chief, and Asaph next, Ch1 6:33. and next to him Zechariah, Jeiel, Shemiramoth, and Jehiel, and Mattithiah, and Eliab, and Benaiah, and Obededom, and Jeiel, with psalteries, and with harps; to play upon them before the ark at the same time the psalms and songs were vocally...
he appointed certain of the Levites to minister before the ark of the Lord--No sooner was the ark deposited in its tent than the Levites, who were to officiate in the choirs before it, entered upon their duties. A select number of the musicians were chosen for the service from the list (Ch1 15:19-21) of those who had taken a prominent part in the recent procession.