Who or what is Asaph?
Recommend you read 1 Chronicles Chapters 6, 15, 25:1-6, 2 Chronicles 29:30 and 35:15
Asaph was a Levi through his son Gershom.
1 Chronicles 6:39 , 43 (NASB)
39 Heman’s brother Asaph stood at his right hand, even Asaph the son
of Berechiah, the son of Shimea, 43 the son of Jahath, the son of
Gershom, the son of Levi.
1 Chronicles 15: 17-29 NASB
The Levites appointed Asaph as a singer and player of cymbals to accompany the Ark from Obed-edom's house to "the city of David"
25 So it was David, with the elders of Israel and the captains over
thousands, who went to bring up the ark of the covenant of the Lord
from the house of Obed-edom with joy
.
1 Chronicles 6:31-44 NASB
Asaph, with Herman and Eltham, served before the tabernacle in directing music and singing.