1 Chronicles 15:24 -

Between these couples probably went the seven priests blowing the trumpets ( Numbers 10:1-9 ). These trumpets were of solid silver, of one piece, were straight and narrow, and had an expanded mouth. They are found on the arch of Titus, and are described by Josephus. On the other hand, the trumpet, more correctly rendered "cornet'' ( שׁוֹפָר , as distinguished from our חְצוֹעְרָה , which was used for proclaiming the jubilee, for announcing the new year for sentinel and other special signals, and for war, was shaped like a ram's horn, and probably made of the same. The particular appropriateness of the use of the former on this occasion is manifest, in addition to the fact that they were the appointed trumpets for the journeying of the camp and a fortiori of the ark itself at a time so essentially religious as the present. Yet, as we learn from verse 28, the latter were used as well, and cymbals , psalteries , and harps. The original number of the silver trumpets was two only, and they were to be sounded strictly by the anointed priests, sons of Aaron, at all events when their employment was within the sanctuary. Their employment, however, grew far more general, and we find ( 2 Chronicles 5:12 ) that their number had risen to a hundred and twenty (so too 2 Chronicles 13:12 ; Nehemiah 12:35 ). For Obed-edom, the doorkeeper, see 1 Chronicles 16:38 ; and therewith note on 1 Chronicles 13:14 .