Matthew Poole and continuators on Nehemiah 11:22

22 The overseer also of the Levites at Jerusalem, was Uzzi the son of Bani, the son of Hashabiah the son of Mattaniah, the son of Micha: of the sons of Asaph, the singers were over the business of the house of God .

i. e. Were to take care at Jerusalem for the supply of such things as were necessary for the Temple and the service of God, from time to time, whilest others minded the outward business, v. 16. And this Office was very proper for them, both as they were Levites▪ to whose care those things belonged; and as they were Singers, who were not to come to Ierusalem by turns, as other Levites, and as the Priests did, but were constantly to reside there, and therefore were more capable of minding this business. Besides their Employment was not so frequent, nor so great as some others were, and therefore they had more leisure for it.