Psalms 42:1

Korah : a man who led a rebellion against Moses and Aaron.,son of Esau and Oholibamah,son of Eliphaz son of Esau,son of Izhar son of Kohath son of Levi,son of Hebron of Judah,son of Izhar (Amminadab) son of Kohath son of Levi

Maskil : a literary or musical term

Psalms 4:1-8

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

Selah : a musical notation for crescendo or emphasis by action (IBD)
(30° 19´, 35° 27´)