I'm sure this has been addressed on the PB somewhere before, but I can't recall the details.
In the OT, singers were appointed as part of worshipping God:
1Ch 15:16 And David spoke to the chief of the Levites to appoint their brethren to be the singers with instruments of music, psalteries and harps and cymbals, sounding, by lifting up the voice with joy.
2Ch 5:12,13 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 a hundred and twenty priests sounding with trumpets: ) It came even to pass, as the trumpeters and singers were as one, to make one sound to be heard in praising and thanking the LORD; and when they lifted up their voice with the trumpets and cymbals and instruments of music, and praised the LORD, saying, For he is good; for his mercy endureth forever: that then the house was filled with a cloud, even the house of the LORD;
2Ch 29:28 And all the congregation worshiped, and the singers sang, and the trumpeters sounded: and all this continued until the burnt offering was finished.
Does the idea of special singers set apart for the music ministry NOT follow from these verses because they are part of the sacrificial part of the law, which has been fulfilled by Jesus? Is this one of those areas where a command to continue the practice would require a command in the NT?