and the Levites stand with the instruments of David, and the priests with the trumpets.

So the Levites took their places with David's instruments, and the priests with their horns.

And the Levites stood, holding the musical instruments of David, and the priests held the trumpets.

And the Levites stood with the instruments of David,.... Which were invented, directed, and ordered to be used by him, and are the same as in the preceding verse:
and the priests with the trumpets; which were made by the direction of Moses, according to the order of God, Numbers 10:2.

דויד כּלי are the musical instruments the use of which David introduced into the public worship; see 1-Chronicles 23:5. - The first clause, 2-Chronicles 29:27, "And Hezekiah commanded to offer the burnt-offering upon the altar," is repeated from 2-Chronicles 29:21 to form a connection for what follows: "At the time when the sacrificial act began, the song of Jahve commenced," i.e., the praising of Jahve by song and instrumental music (יהוה שׁיר = ליהוה שׁיר, 1-Chronicles 25:7), and (the blowing) of trumpets, "and that under the leading (ידי על) of the instruments of David." This is to be understood as denoting that the blowing of the trumpets regulated itself by the playing of the stringed instruments-suited itself to the song and the music of the stringed instruments.