Asaph

Facts

Asaph was a Levite priest and gifted musician who wrote the music for the psalms of King David. He also wrote his own psalms.

Asaph was appointed by King David to be one of three musicians who were responsible for the "service of song" in the temple.
Some of these songs were also prophecies.
Asaph trained his sons and they and other descendants carried on this responsibility, playing instruments and prophesying in the temple.
Psalms 50 and 73-83 are said to be from Asaph. It may be that some of these psalms were also written by his family members.