Answer :
Yes, it is true that n film, music that the characters can hear is called source music because the source of the sound is usually visible on screen.
The Star Wars universe is very much influenced by music, but it's also fascinating to examine how the saga uses sound. Source music straddles the line between a score and sound effects. Source music is also referred to as "diegetic music," which denotes that it originates from a source in the narrative such as a car speaker or a live band. Non-diegetic music, such as their own themes and dramatic underscoring, is music that the characters inside the story cannot hear.
Sound effects have always captivated George Lucas, even during his early days of film school. Source sounds transform into a useful tool in his renowned student film Electronic Labyrinth THX 1138 4EB, which has bizarre distorted language and disembodied electronic chatter.
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