Psalms 78:1

Asaph : father of Joah, Hezekiah's recorder,son of Berechiah the Levite; music minister under David,father of Zichri; a Levite ancestor of some returnees,an official over the (Persian) king's forest in Judah

Maskil : a literary or musical term

Psalms 12:1-8

David : a son of Jesse of Judah; king of Israel,son of Jesse of Judah; king of Israel

sheminith : a musical term: an 8 stringed lyre or 'down an octave' (NASBfn)

Sheminith : a musical term: an 8 stringed lyre or 'down an octave' (NASBfn)