Ö..to three triads:
C D E F G A B C D
C D E F G A B C D
C D E F G A B C D
C D E F G A B C D
tune the white keys of the pianoÖ...
C-E-G:
G-B-D:
F-A-C:
Now calculate the required frequencies:
they must be in the proportions 1 - 5/4 - 3/2
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