1 Samuel ch.16 - "Spirit of God" or an "Evil Spirit"?

Samuel is sent to anoint a new king, and visits Yishai's family in Bethlehem. Seven sons don't find favour with God, but the youngest - David - is chosen as king and anointed by the prophet. Meanwhile, King Saul is mysteriously being afflicted by an "evil spirit from the Lord". His solution is music. His minstrel will be none other than the young David! [Music. Kaleo: Can't Go On Without You]