Heinichen and The Circle of Fifths
Which of the following describes a significant contribution by Johann David Heinichen to the 18th-century development of the circle of fifths?
A
He proposed a three-dimensional sphere of fifths, incorporating modal scales alongside major and minor keys
B
He developed a linear representation of key relationships, rejecting the circular model entirely
C
He expanded the circle to include all 24 major and minor keys, enhancing its practical application in composition and modulation
D
He introduced the concept of enharmonic equivalence, but limited the circle to only 12 major keys
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