1 Chronicles 15:16-24

Then David told the chiefs of the Levites to appoint their relatives as the singers, with instruments of music—harps, lyres, and cymbals—to play loudly and to raise sounds of joy [with their voices]. So the Levites appointed Heman the son of Joel, and from his relatives, Asaph the son of Berechiah; and from the sons of Merari their relatives, Ethan the son of Kushaiah, and with them their relatives of the second rank: Zechariah, Ben, Jaaziel, Shemiramoth, Jehiel, Unni, Eliab, Benaiah, Maaseiah, Mattithiah, Eliphelehu, and Mikneiah, Obed-edom, and Jeiel, the gatekeepers. So the singers, Heman, Asaph, and Ethan were appointed to sound aloud the bronze cymbals; and Zechariah, Aziel, Shemiramoth, Jehiel, Unni, Eliab, Maaseiah, and Benaiah [were to play] with harps tuned to Alamoth [that is, a high pitch]; and Mattithiah, Eliphelehu, Mikneiah, Obed-edom, Jeiel, and Azaziah were to lead with lyres set to Sheminith [that is, the eighth string, a low pitch]. Chenaniah, leader of the Levites, was in charge of the singing; he gave instruction in singing because he was skilled. Berechiah and Elkanah were gatekeepers for the ark. Shebaniah, Joshaphat, Nethanel, Amasai, Zechariah, Benaiah, and Eliezer the priests blew the trumpets before the ark of God. Obed-edom and Jehiah (Jeiel) were also gatekeepers for the ark.