Who invented the musical?

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Tags

1. #theory
2. #signatures
3. #standard
4. #adding
5. #vocal
6. #improvements
7. #friendly
8. #guido
9. #arezzo
10. #reworked
11. #scale
12. #solfege
13. #first
14. #improved
15. #music
16. #invented
17. #notation