Use of music in films

What does music do in films?
-creates an atmosphere
-creates mood
-triggers emotions
-creates emotional cues
-emphasis action
-helps narrative flow
-hints to the emotional plate of characters
-established locations (motifs)
-established characters.
-culture/time

Terminology
-diagetic 
 characters can hear
-non diagetic
 characters can't hear
-sound effects
-amplified sound
-ambeint sound
-characters theme
-aural motifs 
 magical effect with a sparkle sound
-sound bridges
-contrapuntal sound
 punctuates the action
-major and minor keys/chords
-sound narrative