The musicians for the temple. Reflecting a modern church where the music is as important as the other ministry roles.
Certainly music was made for praising God, reaching for the divine, bonding communities.
They were divided into 24 bands of 12 musicians and played twice during the 48 week yearly cycle, like the other priests.
I wonder what it was like being completely unmusical and being born into the music priestly families. Your calling is determined by clan, not talent. Maybe that’s why the Psalmist wrote ‘make a joyful noise unto the Lord’