1. incidental music
Wikipedia definition
2. Incidental musicIncidental music is music in a play, television program, radio program, video game, film or some other form not primarily musical. The term is less frequently applied to film music, with such music being referred to instead as the "film score" or "soundtrack". Incidental music is often "background" music, and adds atmosphere to the action.
Read “Incidental music” on English Wikipedia
Read “付随音楽” on Japanese Wikipedia
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