Jamieson, Fausset and Brown on 1 Chronicles 15:16-24

16-24. David spake to the chief of the Levites to appoint ... the singers with instruments--These eminent Levites were instructed to train the musicians and singers who were under them, for the solemn procession. The performers were ranged in three choirs or bands, and the names of the principal leaders are given (1Ch 15:17, 18, 21), with the instruments respectively used by each. "Ben" (1Ch 15:18) is omitted (1Ch 15:20). Either it was used merely as a common noun, to intimate that Zechariah was the son of Jaaziel or Aziel, or Ben is the same as Azaziah [1Ch 15:21].