Asaph was the chief, Zechariah second, then Jeiel, Shemiramoth, Jehiel, Mattithiah, Eliab, Benaiah, Obed-Edom and Jeiel. They were to play the lyres and harps, Asaph was to sound the cymbals,
and Benaiah and Jahaziel the priests were to blow the trumpets regularly before the ark of the covenant of God.
That day David first committed to Asaph and his associates this psalm1 of thanks to the LORD:
References for 1 Chronicles 16:7