while David and all Israel were energetically ¹  celebrating before God, singing and playing various stringed instruments, ²  tambourines, cymbals, and trumpets.

Asaph was the leader and Zechariah second in command, followed by Jeiel, Shemiramoth, Jehiel, Mattithiah, Eliab, Benaiah, Obed-Edom, and Jeiel. They were to play stringed instruments; Asaph was to sound the cymbals;