The Circle of Fifths

Going the other way on the circle gives us the flat keys.

Going from C major to the left, we go to its fourth scale degree- F, and this becomes our next key.
We add one flat to the key signature for each scale in this direction in the order B E A D G C F, discussed in the last lesson.

Notice that the bottom of the circle contains three keys that overlap.
These are enharmonic keys because their starting pitch (or tonic) is enharmonic with the starting pitch of another scale.

The enharmonic keys are:
C sharp - D flat
F sharp - G flat
B - C flat

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