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Kitto's Popular Cyclopedia of Biblical Literature
A´saph (assembler), a Levite, son of Barachias (1 Chronicles 6:39; 1 Chronicles 15:17), eminent as a musician, and appointed by David to preside over the sacred choral services which he organized. The 'sons of Asaph' are afterwards mentioned as choristers of the temple (1 Chronicles 25:1-2; 2 Chronicles 20:14; 2 Chronicles 29:13; Ezra 2:41; Ezra 3:10; Nehemiah 7:44; Nehemiah 11:22): and this office appears to have been made hereditary in his family (1 Chronicles 25:1-2). Asaph was celebrated in after times as a prophet and poet (2 Chronicles 29:30; Nehemiah 12:46), and the titles of twelve of the Psalms (Psalms 73-83) bear his name. The merits of this appropriation are elsewhere examined [PSALMS, BOOK OF].
There were two other persons named Asaph: one who occupied the distinguished post of 'recorder' to king Hezekiah (2 Kings 18:18; Isaiah 36:3); another who was keeper of the royal forests under Artaxerxes (Nehemiah 2:8).
Kitto, John, ed. Entry for 'Asaph'. "Kitto's Popular Cyclopedia of Biblical Literature". https://www.studylight.org/encyclopedias/eng/kbe/a/asaph.html.