Also the Levites which were the singers, all of them of Asaph, of Heman, of Jeduthun, with their sons and their brethren, being arrayed in white linen, having cymbals and psalteries and harps, stood at the east end of the altar, and with them an hundred and twenty priests sounding with trumpets:) A hundred and twenty priests - Cymbals, psalteries, and harps, of any kind, in union with a hundred and twenty trumpets or horns, could not produce much harmony; as to melody, that must have been impossible, as the noise was too great.
Related Commentaries of 2 Chronicles 5:12
2 Chronicles 5:12
12 Also the Levites which were the singers, all of them of Asaph, of Heman, of Jeduthun, with their sons and their brethren, being arrayed in white linen, having cymbals and psalteries and harps, stood at the east end of the altar, and with them an hundred and twenty priests sounding with trumpets:)