What is RR in background music?

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Tags

1. #listened
2. #function
3. #meant
4. #specific
5. #suitable
6. #medium
7. #space
8. #background
9. #focus
10. #uncountable
11. #whose
12. #played
13. #rather
14. #video
15. #other
16. #occasion
17. #establishes
18. #audience
19. #create
20. #atmosphere
21. #music
22. #public