Psalms 50:1

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

Psalms 16:1-11

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

Miktam : a literary or musical term (NIV margin)

Pit : the place of the dead

pit : the place of the dead

Sheol : the place of the dead