Zechariah, Aziel, Shemiramoth, Jehiel, Unni, Eliab, Maaseiah and Benaiah were to play the lyres according to "alamoth,"
References for 1 Chronicles 15:20
and Mattithiah, Eliphelehu, Mikneiah, Obed-Edom, Jeiel and Azaziah were to play the harps, directing according to "sheminith."
References for 1 Chronicles 15:21
Kenaniah the head Levite was in charge of the singing; that was his responsibility because he was skillful at it.
Berekiah and Elkanah were to be doorkeepers for the ark.
Shebaniah, Joshaphat, Nethanel, Amasai, Zechariah, Benaiah and Eliezer the priests were to blow trumpets1 before the ark of God. Obed-Edom and Jehiah were also to be doorkeepers for the ark.
References for 1 Chronicles 15:24