The musicians and Levite family leaders stayed in rooms at the sanctuary ¹  and were exempt from other duties, for day and night they had to carry out their assigned tasks.

David told the leaders of the Levites to appoint some of their relatives as musicians; they were to play various instruments, including stringed instruments and cymbals, and to sing loudly and joyfully. ¹ 

David was wrapped in a linen robe, as were all the Levites carrying the ark, the musicians, and Kenaniah the supervisor of transport and the musicians; ¹  David also wore a linen ephod. ²