“And David spake to the chief of the Levites to appoint their brethren to be the singers with instruments of musick, psalteries and harps and cymbals, sounding, by lifting up the voice with joy.”
King James Version (KJV)
15:18 Second degree - The first rank of sacred musicians being thosethree famous persons named ver.#17|, next to whom were these here named.Porters - who were to keep the doors of the tabernacle and courts,but with all were instructed in musick, that when these were freefrom attendance upon their proper office, they might not be idle norunprofitable in God's house.