comes from sorces within the shot, i.e radio, t.v, cars, people talking, music is usual NOT non-diagetic unless it is comeing from a radio or t.v
non diegetic sound is usualy background music, it cannot be heard by the characters it can also be a characters taoughts. it can also be a voice over or, the main characters talking directly to the audiance altho this is rare.
music played by and orchestra.
A distinctive tune,
music haveing no established key.
percussive sounds forming a beat.
discordant (non-harmonious) combination of sounds or lacking conventional harmonies.