最終更新日：2024/08/07
The Guidonian scale is a musical scale that was developed by Guido of Arezzo.
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The Guidonian scale is a musical scale that was developed by Guido of Arezzo.
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The Guidonian scale is a musical scale that was developed by Guido of Arezzo.
The Guidonian scale is a musical scale that was developed by Guido of Arezzo.
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