C. F. Keil and Franz Delitzsch on 1 Chronicles 23:30

1Ch 23:30 “On each morning and evening to praise the Lord with song and instruments.” These words refer to the duties of the singers and musicians, whose classes and orders are enumerated in 1 Chron 25. The referring of them to the Levites who assisted the priests in the sacrificial worship (Berth.) needs no serious refutation, for וּלהלּל הודות is the standing phrase for the sacred temple music; and we can hardly believe that the Levites sang psalms or played on harps or lutes while the beasts for sacrifices were slaughtered and skinned, or the meat-offerings baked, or such duties performed.