1 Chronicles 25:6 TLB

[6] Their music ministry included the playing of cymbals, harps, and zithers; all were under the direction of their father as they performed this ministry in the Tabernacle. Asaph, Jeduthun, and Heman reported directly to the king. They and their families were all trained in singing praises to the Lord; each one-288 of them in all-was a master musician.