וּבְנָיָ֥הוּ וְיַחֲזִיאֵ֖ל הַכֹּהֲנִ֑ים בַּחֲצֹצְר֣וֹת תָּמִ֔יד לִפְנֵ֖י אֲר֥וֹן בְּרִית־הָאֱלֹהִֽים׃
und Benaja und Jahaziel, die Priester, ständig mit Posaunen vor der Lade des Bundes Gottes.
Rashi
And Benaiah and Jahaziel the priests with trumpets constantly Trumpets were the musical instruments of the priests. A similar case is found above (15:24): “And Shebaniah, etc. and Eliezer. the priests, sounding the trumpets.”